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Tonnage Calculator

Result

Calculated result Ready Change any value to calculate instantly.
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Tonnage Calculator — free online calculator.

Formula

US short tons = Pounds ÷ 2000; Metric tonnes = Kilograms ÷ 1000
  • Mass tonnage calculator. This page explains the calculator's stated mathematical relationship and includes a worked example.
  • The main inputs are Weight, Unit. Enter them in the units and format shown in the calculator.
  • Keep measurements and project assumptions consistent before comparing or combining values.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Tonnage

Inputs
  • Weight: 2000
  • Unit: lb

4,000 lb = 2 US short tons; 2,500 kg = 2.5 metric tonnes.

Sample result: Calculating…

Frequently asked questions

What does the Tonnage calculate?

This calculator treats tonnage as mass; it does not infer weight from volume without density.

Which values should I enter?

Enter Weight, Unit using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: US short tons = Pounds ÷ 2000; Metric tonnes = Kilograms ÷ 1000.

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 6, 2026