Speed Calculator
Calculate speed, distance, or time using physics formulas with support for multiple units and real-world comparisons
Speed Calculator
Formula
Speed = Distance ÷ Time
Results
44.704
m/s
(Racing car speed)
100
mph
160.9343
km/h
44.704
m/s
146.6667
ft/s
86.8977
knots
What is Speed Calculator?
The speed calculator helps you solve physics problems involving speed, distance, and time. By providing any two of these values, you can calculate the third using fundamental physics formulas.
Basic Formulas
Speed = Distance ÷ Time
Distance = Speed × Time
Time = Distance ÷ Speed
Supported Units
Speed Units
- • mph (miles per hour)
- • km/h (kilometers per hour)
- • m/s (meters per second)
- • ft/s (feet per second)
- • knots (nautical miles per hour)
Distance Units
- • mi (miles)
- • km (kilometers)
- • m (meters)
- • ft (feet)
- • yd (yards)
Time Units
- • s (seconds)
- • min (minutes)
- • h (hours)
- • days (days)
Real-World Applications
- Calculate travel time for trip planning
- Determine average speed during exercise or sports
- Solve physics and engineering problems
- Convert between different speed units
- Analyze vehicle performance and fuel efficiency
Speed Reference Guide
Human Speeds:
- Walking: 3-4 mph
- Running: 6-12 mph
- Cycling: 10-20 mph
- Swimming: 2-4 mph
Vehicle Speeds:
- City driving: 25-35 mph
- Highway: 65-80 mph
- Commercial jet: 550 mph
- Sound: 767 mph
FAQ - Speed Calculator
The calculations use precise conversion factors and are accurate to several decimal places. The results are suitable for most practical applications including scientific and engineering calculations.