How to use the gear centre distance calculator
Find the centre to centre distance of two meshing gears from their tooth counts and module. Enter teeth on gear 1, teeth on gear 2, module in the fields above; the centre-to-centre distance, gear ratio are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “gear center distance”, “meshing gears spacing”, “gear ratio calculator”, “calculate gear centre distance”, “find centre-to-centre distance”.
Formula
Variables
- N1 — Teeth on gear 1
- N2 — Teeth on gear 2
- m — Module (mm)
Worked example
With teeth on gear 1 = 20, teeth on gear 2 = 40, module = 2 mm, the calculator gives centre-to-centre distance ≈ 60 mm; gear ratio ≈ 2.
Frequently asked questions
What is the gear centre distance calculator used for?
Find the centre to centre distance of two meshing gears from their tooth counts and module. It helps with questions such as “gear center distance”, “meshing gears spacing”, “gear ratio calculator”.
What is the formula for the gear centre distance calculation?
Centre-to-centre distance (mm) = (N1+N2) × m / 2. Gear ratio = N2 / N1. Here N1 is teeth on gear 1, N2 is teeth on gear 2, m is module (mm).
What inputs do I need for the gear centre distance calculator?
You need teeth on gear 1, teeth on gear 2, module in mm. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the gear centre distance calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the gear centre distance result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.