Robot Payload Capacity Calculator

Work out robot payload capacity instantly with clear inputs, formula shown and shareable results.

About Robot Payload Capacity Calculator

Robot payload is really a wrist moment limit. The rated payload applies at a stated centre of gravity distance, so moving the load further out reduces the allowable mass in inverse proportion. The gripper's own mass comes off that budget before any part can be carried.

Formula

Payload at offset

allowable mass = rated payload x rated CoG / actual CoG, then subtract the tool mass

Worked example

With the default values below, Robot Payload Capacity Calculator returns Available part payload of 5.53. Change any input above and every figure here is recalculated in your browser.

Inputs used

Rated payload at the wrist: 10 kg
End effector mass: 2.8 kg
Load centre of gravity distance: 120 mm
Rated centre of gravity distance: 100 mm

Results

Available part payload: 5.53 kg
Wrist moment used: 9.81 N·m
Rated wrist moment: 9.81 N·m
Assessment: Feasible - check dynamic load at full speed too

Step by step

1Values used
2Payload at offset
3Available part payload= 5.53 kg
4Wrist moment used= 9.81 N·m
5Rated wrist moment= 9.81 N·m
6Assessment= Feasible - check dynamic load at full speed too

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why does the centre of gravity matter so much?

The wrist axes are torque limited, and torque is mass times distance. Doubling the offset halves the mass that can be carried.

Is static payload enough to check?

No. Acceleration adds inertial load, so a robot at full payload usually has to be slowed, and the manufacturer's inertia limits must also be met.