Compare calculators
Both calculators run independently — 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
Lorentz Transformation Calculator
Transforms the spacetime coordinates (x, t) of an event from one inertial reference frame to another moving at relativistic velocity. Used in special relativity to reconcile observations made by different observers.
Fill in the required fields to see your result.
Key differences
| Length Contraction Calculator | Lorentz Transformation Calculator | |
|---|---|---|
| Category | Relativity | Relativity |
| Inputs required | 3 | 4 |
| Result | Contracted Length (length units) | Transformed Value (varies) |
| 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. | Transforms the spacetime coordinates (x, t) of an event from one inertial reference frame to another moving at relativistic velocity. Used in special relativity to reconcile observations made by different observers. |