Speed Distance Time Calculator
Solve for speed, distance, or time using the SDT formula. Supports multiple units with instant conversions.
Formula
Speed = Distance ÷ Time
Hours
:
Minutes
:
Seconds
Speed
--
Formula
Distance = Speed × Time
Hours
:
Minutes
:
Seconds
Distance
--
Formula
Time = Distance ÷ Speed
Time
--
| Activity / Object | Speed (mph) | Speed (km/h) |
|---|---|---|
| Walking | 3.1 mph | 5 km/h |
| Jogging | 6 mph | 9.7 km/h |
| Cycling | 15 mph | 24 km/h |
| Car (city) | 30 mph | 48 km/h |
| Car (highway) | 65 mph | 105 km/h |
| Train (high-speed) | 186 mph | 300 km/h |
| Commercial Airplane | 575 mph | 925 km/h |
| Speed of Sound | 767 mph | 1,235 km/h |
| Speed of Light | 186,282 mi/s | 299,792 km/s |
Speed, Distance & Time Formulas
Find Speed
S = D ÷ T
Find Distance
D = S × T
Find Time
T = D ÷ S
Frequently Asked Questions
Speed equals distance divided by time (S = D/T). For example, if you travel 120 miles in 2 hours, your speed is 120 ÷ 2 = 60 mph. Enter your distance and time in our calculator for instant results in multiple units.
Use the formula Time = Distance ÷ Speed. For example, a 300-mile trip at 60 mph takes 300 ÷ 60 = 5 hours. Our calculator handles unit conversions automatically and shows results in hours, minutes, and seconds.
Multiply mph by 1.60934 to get km/h. For example, 60 mph × 1.60934 = 96.56 km/h. Our calculator shows results in both units automatically.
Distance equals speed multiplied by time (D = S × T). For example, traveling at 65 mph for 3 hours covers 65 × 3 = 195 miles.
Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction). For everyday calculations like travel time, speed and velocity are used interchangeably. This calculator works with speed values.