ConvBolt — Unit ConverterTonnes to Grams Converter
Converting tonnes to grams is a multiplication by a fixed factor: 1 t = 1000000 g. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one tonne works out to 1000000 g, the gram is the much larger unit of the two: a figure given in gram always carries a larger number than the same measurement in tonne. A chart drawn in t can hide that, so check which label the axis uses before you compare two readings.
Where a legal or postal limit is set in grams, the same limit expressed in tonnes has to be exact — an overshoot of even one unit can change the chargeable band.
The conversion factor used here is 1000000 g per tonne (0 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 t a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 1.0000e-6 t per g, the exact reciprocal, so a round trip through both pages returns your original number.
Tonnes to Grams formula
Use this formula to convert any tonne value to grams:
Worked example: 100 t × 1000000 = 1.0000e+8 g.
Tonnes to Grams conversion table
| Tonnes (t) | Grams (g) |
|---|---|
| 0.5 t | 500000 g |
| 1 t | 1000000 g |
| 2 t | 2000000 g |
| 5 t | 5000000 g |
| 10 t | 1.0000e+7 g |
| 20 t | 2.0000e+7 g |
| 50 t | 5.0000e+7 g |
| 100 t | 1.0000e+8 g |
| 500 t | 5.0000e+8 g |
| 1000 t | 1.0000e+9 g |
How to convert tonnes to grams
Multiply the tonne value by 1000000 to get the equivalent in grams. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the Grams to Tonnes converter instead of dividing by hand; both pages use the same source factors. For every other t conversion in one place, see the t conversion hub.
Frequently asked questions
How many grams are in 1 tonne?
1 tonne = 1000000 g.
What is 100 tonnes in grams?
100 t = 1.0000e+8 g.
Is converting tonnes to grams the same as grams to tonnes?
No — the direction changes the multiplier. The reverse conversion (1 g = 1.0000e-6 t) is on the Grams to Tonnes page.
Related conversions
Try the ConvBolt Unit Converter for any other weight unit, browse the Weight conversions, or read our conversion guides.