Gravitational force calculator
Compute the gravitational attraction between two masses (Newton's law).
Related tools
All Physics tools →Enter Mass 1 (kg), Mass 2 (kg), Distance (m) and the Gravitational force calculator works out Gravitational force (N) straight away. For instance, with Mass 1 (kg) = 1,000, Mass 2 (kg) = 1,000 and Distance (m) = 10 it returns Gravitational force (N) = 0.
How to use it
- Enter your values: Mass 1 (kg), Mass 2 (kg), Distance (m).
- Read the result instantly: Gravitational force (N).
Frequently asked questions
How does the Gravitational force calculator work?
It takes Mass 1 (kg), Mass 2 (kg) and Distance (m) and derives Gravitational force (N) from them. The calculation is live as you type, so the result updates on every change.
Which values does the calculator ask for?
3 values: Mass 1 (kg), Mass 2 (kg) and Distance (m). Nothing else is required — no account, no file upload.
What does a typical calculation look like?
With Mass 1 (kg) = 1,000, Mass 2 (kg) = 1,000 and Distance (m) = 10, the calculator returns Gravitational force (N) = 0. Those figures come from running this exact tool, so you can reproduce them by entering the same values.
When would I actually use this?
Checking a homework answer, sizing something before building it, and getting an order of magnitude before committing to a design — a torque on a bolt, the force a spring returns, the frequency a circuit resonates at, how long light takes to arrive.
What is the most common mistake?
Feeding in a value in the wrong unit. Physics formulas assume SI throughout, so grams instead of kilograms or centimetres instead of metres shifts the answer by powers of ten without any warning.
What is the difference between the Gravitational force calculator and the Centripetal force calculator?
This one returns Gravitational force (N); the Centripetal force calculator returns Centripetal force (N). That is the whole difference — open the one whose figure you need.
Is there a tool for the next step?
Force calculator (F = ma) is the closest one after this: Compute force from mass and acceleration using Newton's second law.
What else is worth having open alongside it?
Friction force calculator and Hydraulic Cylinder Force Calculator — they come up in the same task often enough to be worth a second tab.
Where do the figures come from, and how current are they?
Constants are the CODATA values and the formulas are the textbook ones. Most assume an idealised case — no air resistance, no friction, a point mass — and the tool says so where the simplification matters.