Calculateur de Gear Ratio
Calculate gear ratio and output speed from input speed and tooth counts.
Formula and method
This calculator computes Gear ratio, Output speed directly in your browser without sending data to an external server.
Mathematical formula
- Gear ratio:
drivenTeeth ÷ drivingTeeth - Output speed:
inputRpm × (drivingTeeth ÷ drivenTeeth)
Variables and parameters
- Driving gear teeth (drivingTeeth): default value 20.
- Driven gear teeth (drivenTeeth): default value 60.
- Input speed (inputRpm): default value 1000 rpm.
Some formulas are undefined for certain input combinations (such as division by zero or logarithms of non-positive numbers). In those cases the live tool displays an alert instead of NaN.
Embed this tool
Paste this snippet into your own site or blog post to embed a live, working copy of this tool. It links back to the full page on SpecWhale.
Frequently asked questions
What equation and variables does Gear Ratio Calculator use?
Gear Ratio Calculator evaluates outputs such as <strong>Gear ratio, Output speed</strong> based on inputs including Driving gear teeth, Driven gear teeth, Input speed. Check the Mathematical Method section for the explicit formula.
What happens if I enter invalid or zero values into Gear Ratio Calculator?
If an input combination is mathematically undefined (such as division by zero or negative square roots), SpecWhale alerts you gracefully rather than returning invalid NaN outputs.
Are my calculations in Gear Ratio Calculator saved or private?
All calculations are 100% private and run locally in your Web browser. Your numbers are never uploaded to any server, but can be saved locally to your device or exported as CSV/JSON.
Is Gear Ratio Calculator free to use?
Yes. Gear Ratio Calculator is completely free, has no usage limit, and does not require an account, email, or API key.
Does Gear Ratio Calculator store or upload my data?
No. Gear Ratio Calculator calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is Gear Ratio Calculator?
Gear Ratio Calculator uses a standard formula (see the Method section above for the exact expression). For high-stakes financial, medical, or legal decisions, confirm the result with a professional or an authoritative source before relying on it.
Can I embed Gear Ratio Calculator on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of Gear Ratio Calculator to your own blog post or page.