How do I convert kilograms to tonnes by hand?

Use t = kg × 0.001. The step-by-step panel shows the same calculation with your own numbers substituted in.

Is the answer exact or rounded?

The calculation itself uses the full stored precision of the defined factor. Only the displayed figure is rounded, and the page also shows a shorter everyday value beside the full one.

Can I check the conversion the other way round?

Yes. The result panel converts the answer straight back into your original unit so you can confirm nothing was lost.

Can I download the result?

Yes — the PDF button produces a branded report with your input, the answer, the formula and the full working.

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Unit Conversions & Measures

Kilograms to Tonnes Converter

Convert kilograms to tonnes with the exact factor, the working shown step by step and a plain-English explanation.

Your inputs

Change any value to update the result instantly.

Unit Conversions & Measures

Value in kilograms

Tonnes

0.1 t

Conversion factor

1 kg = 0.001 t

Value in kilogram (internal base unit)

100 kg

Reverse conversion check

0.1 t = 100 kg

Rounded for everyday use

0.1 t

The metric tonne is 1000 kg.

What this calculator does

Converts a measurement given in kilograms into tonnes using the defined conversion factor.

What your result means

The same quantity expressed in t instead of kg. Nothing about the measurement itself changes.

Formula and working

t = kg × 0.001

1
Start with your value
100 kg
2
Convert to kilogram
100 × 1 = 100 kg
3
Convert into tonnes
100 ÷ 1,000 = 0.1 t
4
Result
100 kg = 0.1 t

Frequently asked questions

Symbols and assumptions

kg: Input unit — kilogram
t: Output unit — tonne

• Both units measure mass and weight, so the physical quantity is unchanged by the conversion.
• The relationship is exactly linear: 1 kg = 0.001 t.
• Values are converted through the SI base unit for this quantity rather than pair by pair.

Sources and review

Reviewed 2026-09-22 · Next review 2027-09-22

The International System of Units (SI Brochure), 9th editionBureau International des Poids et Mesures · 9th edition Guide for the Use of the International System of Units (SI), NIST Special Publication 811 — conversion factorsNational Institute of Standards and Technology · 2008 edition NIST Handbook 44 — Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring DevicesNational Institute of Standards and Technology

• A unit conversion changes how a number is expressed, not how it was measured — the answer can never be more accurate than the value entered.
• The metric tonne is 1000 kg.

Important limitation

This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.

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