CalcSpeed Calculator
Last updated: 2026-05-09
The Speed Calculator is a free science calculator. Speed Calculator. Free online calculator with formula, examples and step-by-step guide. Solve physics and science problems with exact formulas.
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Result
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Common Sizes — Click to Fill
| distance | time_min | time_sec |
|---|---|---|
| 5 | 25 | 0 |
| 10 | 50 | 0 |
| 21.1 | 105 | 0 |
| 42.2 | 210 | 0 |
| 42.2 | 240 | 0 |
Speed, distance, and time relationship
The speed, distance, and time calculator solves any of the three quantities when you know the other two. It's one of the most fundamental formulas in classical physics, with direct applications in driving, cycling, running, physics, and astronomy.
The three formulas
- Speed: v = d ÷ t
- Distance: d = v × t
- Time: t = d ÷ v
Practical examples
Example 1 – Speed: traveled 150 miles in 2.5 hours?
- v = 150 ÷ 2.5 = 60 mph
Example 2 – Time: how long at 60 mph to cover 240 miles?
- t = 240 ÷ 60 = 4 hours
Speed unit conversions
- 1 mph = 1.609 km/h
- 1 km/h = 0.6214 mph
- 1 m/s = 3.6 km/h = 2.237 mph
- 1 knot = 1.852 km/h (nautical and aviation)
Related calculators: Speed Converter · Fuel Cost Calculator