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Speed Calculator
Calculate speed, distance, or time using the speed formula (d=st). Convert between mph, km/h, m/s, and knots.
Gallons Used
10 gal
Total Cost
$35.00
Cost Per Mile
$0.12
How to Use the Speed Calculator
Enter your values above for an instant result. This tool uses verified formulas and is optimised for users in USA, Canada, UK, Australia. All calculations happen in your browser — your data is never sent to our servers.
Frequently Asked Questions
How do you calculate speed?
Speed = Distance / Time. If you travel 120 miles in 2 hours, speed = 120/2 = 60 mph.