Calculator
| Scenario | Entity A | Entity B | Unit |
|---|---|---|---|
| Runner comparison | 12 | 9 | m/s |
| Bike comparison | 30 | 24 | km/h |
| Train comparison | 90 | 75 | km/h |
| Machine belt speed | 1500 | 1200 | rpm |
Basic speed ratio: Speed Ratio = Speed A ÷ Speed B
Ratio form: Speed A : Speed B
Simplified ratio: Divide both values by a common factor.
Time relationship for equal distance: Time Ratio = Speed B ÷ Speed A
Percentage faster: ((Speed A − Speed B) ÷ Speed B) × 100
Time from distance: Time = Distance ÷ Speed
Distance from time: Distance = Speed × Time
These formulas help compare motion, machine cycles, transport efficiency, and task rates when two different speeds are involved.
- Enter Speed A and Speed B in the same measurement unit.
- Add optional distances to estimate travel time for each case.
- Add optional time values to compare covered distance.
- Choose a mode that matches your comparison goal.
- Press the calculate button to generate the ratio summary.
- Review the result cards, graph, and example table.
- Use CSV or PDF export buttons for reporting.
1. What is a speed ratio?
A speed ratio compares two speeds by division or by ratio notation. It shows how many times one speed is larger or smaller than another speed.
2. Do both speeds need the same unit?
Yes. Convert both speeds into the same unit first. Otherwise, the ratio will not represent a true comparison.
3. Why is time ratio the inverse of speed ratio?
For the same distance, higher speed means less time. That creates an inverse relationship between speed and time.
4. Can I compare vehicles and runners here?
Yes. The calculator works for any comparable speeds, including athletes, vehicles, machines, conveyors, and rotating systems.
5. What does percentage faster mean?
It expresses how much Speed A exceeds Speed B relative to Speed B. It is useful for performance discussions and reporting.
6. Why simplify the ratio?
A simplified ratio is easier to read and compare. For example, 60:40 becomes 3:2 and communicates the relationship more clearly.
7. Can this calculator estimate travel time?
Yes. When you enter distance values, it calculates the time each speed needs to complete those distances.
8. What is the graph showing?
The graph shows how travel time changes across several sample distances for both entered speeds. It makes the difference visually obvious.