Time Speed Distance Calculator (TSD)

Find Distance, Speed, or Time instantly using the classic TSD formulas. This tool converts units (km/h ↔ m/s, KM ↔ Meter, hour ↔ seconds) and shows a clean step-by-step solution.

Tip: The value you are solving for becomes disabled and moves to the bottom to avoid mistakes.

Result will appear here Default example is loaded below.

Loaded default example and calculated the answer.

Time Speed Distance formulas

The Time–Speed–Distance relationship is used in school math, physics basics, travel planning, and exam problems.

DistanceD = S × T
SpeedS = D ÷ T
TimeT = D ÷ S

How to use this calculator

Step 1: Choose what you want to calculate (Distance, Speed, or Time).

Step 2: Enter the other two values and select units.

Step 3: Click Calculate to get the final answer and steps.

Frequently Asked Questions

What is the TSD formula?

D = S × T. You can rearrange it to S = D ÷ T and T = D ÷ S.

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Provided as-is for general use. Verify important calculations independently.

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