LINEAR ACTUATOR CALCULATOR TOOLS

Picking the wrong actuator wastes time, money, and sometimes hardware. An undersized unit stalls under load. An oversized one costs more than it should and may not fit the space. The difference between a project that works and one that doesn't usually comes down to five minutes of measurement and some straightforward math.

This guide walks you through exactly what to measure, what to think about, and — once you have your numbers — gives you a ready-to-paste prompt template you can drop into any AI assistant, ChatGPT, Claude, Gemini, or whichever you prefer, to calculate the actuator specs your project needs. No engineering degree required.

If you are wondering how to size an electric linear actuator, this article works as a practical electric linear actuator sizing guide for DIY builds, home upgrades, and linear actuator for automation projects applications. You can also use the prompt templates below like a simple linear actuator calculator, actuator calculator, or linear actuator size calculator before choosing a specific model.

First: What Type of Application Are You Building?

Linear actuator projects fall into two categories, and the sizing approach is different for each.

Direct push or lift. The actuator pushes or pulls a load in a straight line. Think: lifting a platform, raising a TV, adjusting a table height, or pushing open a sliding panel. This can include an electric lift actuator for TV project where the actuator raises or lowers a TV panel or cabinet mechanism. The force calculation here is simple — the actuator needs to move the weight of the object, divided by however many actuators share the load.

Hinged or pivoting. The actuator opens something that rotates around a hinge point — a hatch, trap door, chicken coop door, tonneau cover, cellar door, skylight, or tilt-out window. This is where most DIYers get tripped up, because the actuator doesn't bear the full weight of the panel. The force it needs depends on where it's mounted relative to the hinge, and that force changes as the panel swings open. The required stroke length is also driven entirely by mounting geometry. This is the type of setup where a linear actuator angle calculator, linear actuator for hinged door sizing, or a chicken coop door actuator setup needs careful measurement before selecting a model.

Figure out which category you're in, then read the relevant section below.

What You Need to Measure

Grab a tape measure, a bathroom scale or a reasonable weight estimate, and something to write with. Every measurement below will plug directly into the AI prompt template later in this guide.

For Direct Lift / Push-Pull Applications

1. Weight of the object (lbs). Weigh it if you can. If not, estimate conservatively — round up, not down. Include anything attached to the object that moves with it, including hardware, panels, accessories, or TV lift components.
2. Travel distance — your stroke length (inches). Measure the total distance the object needs to move from its starting position to its end position. This becomes your minimum stroke length. You can also think of this step as a simple actuator stroke length calculator input: the travel distance you measure becomes the stroke length you need.
3. Number of actuators. How many actuators will share the work? A single actuator centered under a load works for many projects. Two actuators, one on each side, are common for wider platforms, tables, and TV lifts to keep things level.
4. Mounting orientation. Is the actuator pushing straight up, sideways, or at an angle? A vertical lift works against gravity the entire stroke. A horizontal push doesn't fight gravity but may have friction to overcome. An angled push falls somewhere in between.
5. Available mounting space. Measure the space where the actuator will sit when fully retracted. Every actuator has a retracted length, the length of the unit when fully closed, that needs to fit within your structure. This is easy to overlook and painful to discover after the actuator arrives.

For a direct lift, these measurements help you calculate linear actuator force and determine whether a standard actuator or a heavy duty linear actuator is necessary.

For Hinged / Pivoting Applications

This is where geometry matters. You're dealing with a panel that rotates around a hinge, and the actuator connects between a fixed point on your frame and a point on the moving panel. The position of those two mounting points — relative to the hinge — determines everything: how much force the actuator needs, how long the stroke must be, and whether the geometry even works.

Here's what to measure:

1. Weight of the panel (lbs). The total weight of the hatch, lid, or door. Weigh it if possible.
2. Panel length (inches). The distance from the hinge edge to the free edge of the panel, the edge that swings open. This is the lever arm that determines how much torque gravity applies.
3. Panel width (inches). How wide the panel is. This matters if you're deciding between one actuator centered or two actuators on each side.
4. Hinge location. Where is the hinge? Top edge, where the panel swings up like a car hood; bottom edge, where the panel folds down like a tailgate; or side edge, where the panel swings sideways like a door. This tells the AI which direction gravity is working.
5. Actuator fixed mount point. Where will the base of the actuator attach to the non-moving structure? Measure two things from the hinge: the perpendicular distance away from the hinge line, how far "out" from the hinge in inches, and the offset distance along the hinge line if applicable.
6. Actuator panel mount point. Where will the actuator connect to the moving panel? Measure the distance from the hinge to this attachment point along the panel surface, in inches. This is critical — the further from the hinge you mount, the less force the actuator needs, but the longer the stroke required. Closer to the hinge means more force, shorter stroke.
7. Desired opening angle (degrees). How far do you want the panel to open? A hatch that opens to 90°, straight up, is common. Some applications need 45°, others need 110°. This measurement is especially important if you are using a linear actuator angle calculator to compare different mounting positions.
8. Number of actuators. One or two? Two actuators, one on each side, cut the force requirement per actuator in half and provide more stability.
9. Available power source. What voltage do you have available? Most hobbyist projects use 12 VDC, common in vehicles, boats, and battery setups, or 24 VDC, often used in home installations with a plug-in power supply.
10. Environment. Where will this live? Indoors, outdoors under a roof, or fully exposed to rain and weather? This determines the IP, Ingress Protection, rating you need — essentially, how waterproof the actuator must be. For outdoor builds, choose an outdoor linear actuator with the right linear actuator IP rating for the environment.

Step 1: Calculate Your Core Specs With AI

Now that you have your measurements, paste one of the following prompt templates into any AI chatbot. Fill in the bracketed fields with your numbers, and the AI will calculate the actuator force rating, stroke length, and mounting feasibility for your project.

You can use these templates like a simple linear actuator calculator, actuator calculator, actuator sizing calculator, or linear actuator size calculator to estimate force, stroke, IP rating, and fit before choosing a specific model. They can also help with how to calculate linear actuator force based on your project type.

Prompt Template A: Direct Lift / Push-Pull

I need help sizing a linear actuator for a direct lift application. Here are my details:

APPLICATION DETAILS:

• What I'm moving: [describe the object, e.g., "a wooden platform," "a TV mounting panel"]
• Total weight of the object: [X] lbs
• Travel distance needed: [X] inches, how far it needs to move
• Mounting orientation: [vertical lift / horizontal push / angled — specify angle if known]
• Number of actuators sharing the load: [1 / 2 / 3 / 4]
• Available voltage: [12 VDC / 24 VDC]
•  Environment: [indoor / outdoor covered / outdoor exposed to rain / submerged]

WHAT I NEED YOU TO CALCULATE:

1. The minimum force rating I need per actuator, apply a 2x linear actuator safety factor to the calculated load.
2. The minimum stroke length. Use this like an actuator stroke length calculator to confirm the required travel distance.
3. What linear actuator IP rating I should look for based on my environment.
4. Any concerns about my setup, e.g., whether I need to worry about linear actuator side loading, buckling, or stability.

Please show your work so I can follow the math and understand how to calculate linear actuator force for this setup.

Prompt Template B: Hinged / Pivoting Application

I need help sizing a linear actuator for a hinged application. The actuator will open and close a panel that pivots around a hinge. Here are my details:

PANEL DETAILS:

• What the panel is: [describe it, e.g., "a plywood hatch," "a steel cellar door," "a chicken coop door"]

Total weight of the panel: [X] lbs

• Panel length, hinge edge to free edge: [X] inches
• Panel width: [X] inches
• Hinge location: [top edge / bottom edge / left side / right side]

ACTUATOR MOUNTING GEOMETRY:

• Fixed mount point, on the non-moving frame:
• Distance from the hinge line: [X] inches perpendicular to the hinge
• Offset along/below the hinge line: [X] inches, how far below or beside the hinge the fixed mount sits
• Panel mount point:

1. Distance from the hinge along the panel surface: [X] inches
2. Desired opening angle: [X] degrees
3. Number of actuators: [1 / 2 — one on each side]

POWER AND ENVIRONMENT:

• Available voltage: [12 VDC / 24 VDC]
• Environment: [indoor / outdoor covered / outdoor exposed to rain]

WHAT I NEED YOU TO CALCULATE:

1. The required actuator force rating, apply a 2x linear actuator safety factor over the peak force at the worst-case angle during the stroke. Use this as a linear actuator force calculator to understand the peak force requirement.
2. The required stroke length based on the mounting geometry.
3. The retracted length of the actuator, so I can verify it fits in the closed position.
4. What linear actuator IP rating I need based on the environment.
5. Whether my chosen mounting positions are mechanically sound — flag any issues like poor leverage, extreme angles, binding risk, or linear actuator side loading.

Please show your math step by step, including the torque analysis at the worst-case angle, so I can follow along.

Worked Example: A Top-Hinged Chicken Coop Door

Here's what a filled-in prompt looks like for a real project, so you can see how the template works in practice.

The project: A chicken coop has a top-hinged plywood door that the owner wants to automate. This is an example of an automated chicken coop door actuator setup. The door is 18 inches tall, hinge to free edge, 24 inches wide, and weighs about 8 lbs. The hinge runs along the top edge. The owner wants it to swing open to 90°, fully horizontal to fully vertical. They plan to use one actuator mounted on the right side, with the actuator's fixed base attached to the coop frame 2 inches below the hinge and 1 inch out from the wall, and the other end attached to the door 14 inches from the hinge along the panel surface. It's outdoors and exposed to weather. They have a 12V battery.

This kind of chicken coop door actuator project is a common example of a linear actuator for hinged door application because the force changes as the panel rotates around the hinge.

The filled-in prompt:

I need help sizing a linear actuator for a hinged application. The actuator will open and close a panel that pivots around a hinge. Here are my details:

PANEL DETAILS:

• What the panel is: a plywood chicken coop door
• Total weight of the panel: 8 lbs
• Panel length, hinge edge to free edge: 18 inches
• Panel width: 24 inches
• Hinge location: top edge

ACTUATOR MOUNTING GEOMETRY:

• Fixed mount point, on the non-moving frame:
• Distance from the hinge line: 1 inch perpendicular to the hinge, out from the wall
• Offset along/below the hinge line: 2 inches, below the hinge
• Panel mount point:
• Distance from the hinge along the panel surface: 14 inches
• Desired opening angle: 90 degrees
• Number of actuators: 1

POWER AND ENVIRONMENT:

• Available voltage: 12 VDC
• Environment: outdoor exposed to rain

WHAT I NEED YOU TO CALCULATE:

1. The required actuator force rating, apply a 2x linear actuator safety factor over the peak force at the worst-case angle during the stroke.
2. The required stroke length based on the mounting geometry.
3. The retracted length of the actuator, so I can verify it fits in the closed position.
4. What linear actuator IP rating I need based on the environment.
5. Whether my chosen mounting positions are mechanically sound — flag any issues like poor leverage, extreme angles, binding risk, or linear actuator side loading.

Please show your math step by step, including the torque analysis at the worst-case angle, so I can follow along and understand how to calculate linear actuator force for this hinged setup.

What the AI will calculate for you: For this chicken coop door, the peak gravitational torque occurs when the door is horizontal, just starting to open or just about to close, because that's when the panel's center of gravity is furthest from the hinge. The AI will work through the trigonometry of your specific mounting points to determine the effective force the actuator must produce at that worst-case position, apply the 2x safety factor, calculate the stroke length from the geometry of the two mount points as the door swings through its arc, and flag whether your mounting positions give the actuator enough mechanical advantage to work smoothly.

For a lightweight door like this one, the result will typically land in the range of a micro or mini actuator — modest force, relatively short stroke. The AI's step-by-step math lets you verify the logic and adjust your mounting points if needed before you buy anything.

Step 2: Refine Your Selection

Once you have your core specs, force rating, stroke length, and IP rating, there are a few more practical factors to think through before you pick a specific actuator. These don't change the physics of your application, but they affect which product is the best fit.

Speed. How fast do you need the actuator to move? Actuator speed is measured in inches per second and there's a universal tradeoff: higher force ratings typically mean slower speeds. If your chicken coop door needs to close quickly before a predator gets in, speed matters. If you're raising a TV over 15 seconds, it probably doesn't. For timing-specific projects, an actuator stroke time calculator can help estimate how long the actuator will take to extend or retract based on stroke length and speed. Know your preference before shopping.

Duty cycle. How often will the actuator run, and for how long each time? An actuator that opens a hatch twice a day has very different demands than one cycling every few minutes in an automated system. Most hobbyist applications are light duty, but if yours cycles frequently, look for actuators rated for higher duty cycles to avoid premature wear.

Retracted length and physical fit. This catches people off guard. The actuator has a physical body that needs to fit inside your structure when fully closed. A 12-inch stroke actuator doesn't magically collapse to zero — it has a retracted hole-to-hole length that's typically a few inches longer than the stroke. Make sure it fits. Check the product datasheet for the retracted hole-to-hole dimension before ordering.

Noise. Some actuators are louder than others. If your project is in a living space, bedroom, or anywhere noise matters, factor this in. Actuators with acme screws tend to be quieter than those with ball screws, though ball screws are more efficient under heavy loads.

Position feedback. Do you need to know exactly where the actuator is in its stroke? If you want to stop the actuator at intermediate positions, not just fully open or fully closed, you'll need an actuator with built-in feedback — either a potentiometer or Hall effect sensor. If you only need full extension and retraction, built-in limit switches, standard on most actuators, are sufficient.

Side loading. Linear actuators are designed for loads along their axis — pushing and pulling in a straight line. If your mounting geometry creates significant side forces, loads perpendicular to the actuator shaft, the actuator will wear faster and may fail prematurely. The AI prompt in Step 1 will flag this if your geometry is problematic, but it's worth keeping in mind as you finalize your mounting positions. Avoiding linear actuator side loading is especially important in hinged doors, hatches, and outdoor automation projects.

Once you've thought through the factors above, you can paste this follow-up prompt into the same AI conversation to refine your specs further:

Based on the actuator specs you just calculated, I have a few follow-up requirements:

ADDITIONAL REQUIREMENTS:

• Speed preference: [fast / moderate / slow — or specific speed like "at least 1 inch per second"]
• Duty cycle: [how often it will run, e.g., "twice a day," "every 10 minutes," "a few times per week"]
• Noise sensitivity: [not a concern / prefer quiet / must be very quiet]
• Position feedback needed: [yes — I need to stop at intermediate positions / no — just fully open and fully closed]
• Maximum retracted length that will fit in my space: [X] inches, measure this from your structure

Based on these additional constraints, please refine your recommendations.

Specifically:

1. What speed range should I look for?
2. What duty cycle rating should the actuator have?
3. Should I look for an actuator with built-in feedback, and if so, what type?
4. Will the retracted length of a typical actuator with these specs fit in my space?
5. Are there any tradeoffs I should be aware of, e.g., higher force models being slower?

Tips for Better Results

Add a safety factor — always. The prompt templates above instruct the AI to apply a 2x safety factor to the calculated force, and we recommend you stick with that. Real-world conditions — friction, wind load, misalignment, material swelling from moisture — add forces that are hard to predict precisely. A 2x linear actuator safety factor means your actuator is loafing through its duty rather than straining at its limit. This extends its lifespan significantly and gives you margin for the unexpected.

Iterate on mounting positions. If the AI tells you the force requirement is very high, try moving your panel mount point further from the hinge. This gives the actuator more leverage and reduces the force it needs — though it increases the required stroke length. There's always a tradeoff, and the AI can recalculate quickly if you change a measurement.

Double-check the retracted length. Before ordering, look up the specific actuator you're considering and confirm its retracted hole-to-hole length on the product page or datasheet. Make sure it physically fits in your structure when closed. This is the number one reason hobbyists end up returning actuators.

Round up, not down. When choosing between two actuator force ratings, always pick the higher one. An actuator operating well below its maximum rated force runs cooler, lasts longer, and handles surprises better. In higher-load applications, this may lead you toward a heavy duty linear actuator, but only if your calculated force rating and project conditions actually require it.

Ready to Shop?

Once you have your specs — force rating, stroke length, voltage, and IP rating — browse our linear actuator catalog and use the filters to narrow down your options. Every product page includes detailed datasheets with retracted and extended lengths, force curves, speed ratings, and duty cycle information.

Not sure which specific model fits your application? Contact our team — we're happy to help you match your calculated specs to the right product. If you are comparing options from Progressive Automations, you can use your calculated specs to narrow down a Progressive Automation linear actuator by force, stroke, voltage, speed, and environmental rating.