Speed Distance Time Calculator

Solve for velocity, distance, or travel duration with standard physics equations and automatic multi-unit conversion.

Kinematics and journey timing made simple. Instantly.

Target Unknown Variable

Total Distance

Elapsed Time

Quick presets:

Calculated Speed

SI Verified

60 km/hSpeed = Distance ÷ Time

Equivalent Conversions

Kilometers / hr60 km/h

Miles / hr37.28 mph

Meters / sec16.67 m/s

Physics reference: 1 m/s = 3.6 km/h. To convert miles to kilometers, multiply miles by ~1.609.

Distance = Speed × Time

Three variables, one equation. Provide any two and the calculator solves for the third.

Formula

Distance = Speed × TimeSpeed = Distance ÷ TimeTime = Distance ÷ Speed

Examples — One Per Solve Mode

Solve for Speed

Distance150 kmTime2.5 hSpeed150 ÷ 2.5 = 60 km/h

Solve for Distance

Speed80 km/hTime3 hDistance80 × 3 = 240 km

Solve for Time

Speed100 km/hDistance350 kmTime350 ÷ 100 = 3.5 h (3 h 30 min)

How unit conversion works

The engine always computes in km/h, km, and hours. When you select different units — m/s, metres, or minutes — the interface converts your inputs to the engine's base units before the calculation, and converts the result back for display. You can freely mix input units (distance in km, time in minutes) without doing any conversions yourself.

Last reviewed August 2026