Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Relativity
Length Contraction Calculator
Compute the contracted length of an object measured by an observer relative to whom it moves at high velocity, using special relativity. Returns the contracted length in the same units as the rest length.
Fill in the required fields to see your result.
Relativity
Time Dilation Calculator
Compute the time experienced by a stationary observer for a moving clock that ticks through a given proper time, using special relativity. Returns the dilated time interval in the same units as the proper-time input.
Fill in the required fields to see your result.
Key differences
| Length Contraction Calculator | Time Dilation Calculator | |
|---|---|---|
| Category | Relativity | Relativity |
| Inputs required | 3 | 2 |
| Result | Contracted Length (length units) | Dilated Time (time units) |
| What it does | Compute the contracted length of an object measured by an observer relative to whom it moves at high velocity, using special relativity. Returns the contracted length in the same units as the rest length. | Compute the time experienced by a stationary observer for a moving clock that ticks through a given proper time, using special relativity. Returns the dilated time interval in the same units as the proper-time input. |