Convert Tonnes (t) to Grams (g)

1 tonne equals 1000000 grams.

Formula: g = t × 1000000

Tonne to Gram Converter

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How to Convert Tonne to Gram

1 tonne = 1000000 grams

Gram = Tonne × 1000000

Example: 1 t × 1000000 = 1000000 g

Reverse Conversion

To convert grams back to tonnes:

  • Remember, 1 gram equals 1 × 10-6 tonnes.
  • To convert 1000000 g to t, multiply 1000000 x 1 × 10-6, resulting in 1 t.

Common Tonne to Gram Conversions

Tonne to Gram (Part 1)
Tonne Gram Actions
1 tonne 1000000 grams
5 tonnes 5000000 grams
10 tonnes 10000000 grams
25 tonnes 2.5 × 107 grams
Tonne to Gram (Part 2)
Tonne Gram Actions
50 tonnes 5 × 107 grams
100 tonnes 1 × 108 grams
500 tonnes 5 × 108 grams
1000 tonnes 1 × 109 grams

Tonnes to grams Conversion Table

Reference table with common tonnes to grams conversions. All values calculated with high precision.

Tonnes to Grams Table
0.0001 to 12

Tonnes Grams Actions
0.0001 t 100 g
0.00025 t 250 g
0.0005 t 500 g
0.001 t 1000 g
0.0025 t 2500 g
0.005 t 5000 g
0.01 t 10000 g
0.025 t 25000 g
0.05 t 50000 g
0.1 t 100000 g
14 t 250000 g
12 t 500000 g

Tonnes to Grams Table
1 to 100000

Tonnes Grams Actions
1 t 1000000 g
2 12 t 2500000 g
5 t 5000000 g
10 t 10000000 g
25 t 2.5 × 107 g
50 t 5 × 107 g
100 t 1 × 108 g
250 t 2.5 × 108 g
500 t 5 × 108 g
1000 t 1 × 109 g
2500 t 2.5 × 109 g
5000 t 5 × 109 g
10000 t 1 × 1010 g
25000 t 2.5 × 1010 g
50000 t 5 × 1010 g
100000 t 1 × 1011 g

Grams to Tonnes Table
100 to 500000

Grams Tonnes Actions
100 g 0.0001 t
250 g 0.00025 t
500 g 0.0005 t
1000 g 0.001 t
2500 g 0.0025 t
5000 g 0.005 t
10000 g 0.01 t
25000 g 0.025 t
50000 g 0.05 t
100000 g 0.1 t
250000 g 14 t
500000 g 12 t

Grams to Tonnes Table
1000000 to 1 × 1011

Grams Tonnes Actions
1000000 g 1 t
2500000 g 2 12 t
5000000 g 5 t
10000000 g 10 t
2.5 × 107 g 25 t
5 × 107 g 50 t
1 × 108 g 100 t
2.5 × 108 g 250 t
5 × 108 g 500 t
1 × 109 g 1000 t
2.5 × 109 g 2500 t
5 × 109 g 5000 t
1 × 1010 g 10000 t
2.5 × 1010 g 25000 t
5 × 1010 g 50000 t
1 × 1011 g 100000 t

Definition of Tonne

Definition
The tonne (t), also called the metric ton, is a metric unit of mass equal to one thousand kilograms. It is commonly used in industry, shipping, and science.

The tonne provides a convenient scale for large masses while remaining compatible with the SI system.
Exact factor
1 t = 1000 kg = 2204.6226218 lb
Examples
• 1.5 t = 1500 kg
• 2 t ≈ 4409.25 lb

Definition of Gram

Definition
The gram (g) is a metric unit of mass equal to one thousandth of a kilogram. It is widely used for measuring small quantities, particularly in food labeling, chemistry, and laboratory work.

Although not an SI base unit, the gram is fully compatible with the SI system and remains one of the most commonly used mass units worldwide.
Exact factor
1 g = 0.001 kg = 0.0352739619 oz
Examples
• 250 g ≈ 8.82 oz
• 500 g = 0.5 kg

About the Tonne

Facts & Uses

  • Also called the metric ton, equal to exactly 1000 kilograms. Recognized as a non-SI unit accepted for use with the SI by the BIPM.
  • Standard for industrial production (steel, cement, grain harvests), international shipping (cargo manifests, container weights), and environmental reporting (CO₂ emissions in tonnes).
  • Used in vehicle weight ratings (a small car ≈ 1–1.5 t; a fully loaded semi-truck ≈ 40 t in the EU), mining, and agriculture.
  • Distinct from the US short ton (2000 lb ≈ 907 kg) and the UK long ton (2240 lb ≈ 1016 kg) — confusion between the three is a common source of trade disputes.

Curiosities

  • The international symbol is "t" (lowercase) — the uppercase T is reserved for the tesla (magnetic flux density), an entirely unrelated SI unit.
  • Global annual CO₂ emissions are measured in billions of tonnes (Gt); a single transatlantic flight emits about 1 t of CO₂ per passenger.
  • The blue whale, the largest animal ever known, weighs up to 180 tonnes — equivalent to about 30 African elephants.
  • 1 t = exactly 1000 kg = 2204.62 lb ≈ 1.102 short tons ≈ 0.984 long tons.

Sources

About the Gram

Facts & Uses

  • Metric unit equal to 1/1000 of a kilogram (10⁻³ kg). Although not an SI base unit itself, it is the most widely used mass unit in everyday metric practice.
  • Standard for nutrition labels worldwide (protein, carbs, fat, sodium per serving), laboratory chemistry, and European cooking recipes.
  • Used in postal rates (most countries outside the US), spice and herb measurements, and illicit drug weights in legal/medical literature.
  • Subdivisions: milligram (pharmaceuticals), microgram (vitamins, hormones); multiples: kilogram, tonne.

Curiosities

  • Originally defined in 1795 as the mass of 1 cubic centimeter of water at 4 °C (its density maximum) — an elegant link between length, volume, and mass that survives only as an approximation today.
  • A standard paperclip weighs about 1 g; a US dollar bill ≈ 1 g; a raisin ≈ 0.5 g — useful for intuiting small masses.
  • 1 g ≈ 0.0353 oz ≈ 0.00220 lb ≈ 15.43 grains.
  • The gram is so practical that the SI Brochure recognizes it explicitly even though kilogram is the base unit — a rare case of pragmatism over purity.

Sources

Frequently Asked Questions

How many grams are in one tonne?

One tonne equals 1000000 grams. To convert, multiply the tonne value by 1000000. For the reverse, divide the gram value by 1000000 (or multiply by 1 × 10-6).

What is 0.01 tonnes in grams?

0.01 tonnes = 10000 grams. This is one of the most commonly searched conversions for this pair.

How precise is the tonne-to-gram conversion?

The factor 1000000 is accurate to 6 significant figures, derived from international measurement standards. Our calculator uses full precision internally.

Looking for the reverse? Convert Gram to Tonne

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Conversion factors verified against NIST (National Institute of Standards and Technology), BIPM (International Bureau of Weights and Measures) 1 lb = 0.45359237 kg by international agreement (1959). Last reviewed: March 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.