Enter grams, pick units, and get mass instantly. See conversions, significant figures, and rounding options. Download a report, then verify with sample table below.
| Grams (g) | Kilograms (kg) | Ounces (oz) | Pounds (lb) | Carats (ct) |
|---|---|---|---|---|
| 5 | 0.005 | 0.17636981 | 0.01102311 | 25 |
| 100 | 0.1 | 3.52739620 | 0.22046226 | 500 |
| 250 | 0.25 | 8.81849049 | 0.55115566 | 1250 |
| 1000 | 1 | 35.27396195 | 2.20462262 | 5000 |
This tool converts a grams input into other mass units using a multiplication factor.
If you enable significant figures, the display rounds accordingly.
Grams are a practical base unit for small masses. A paperclip is about 1 g, a teaspoon of water is near 5 g, and many lab samples are logged in the 0.01–500 g range. Converting from grams keeps data consistent across reports and suppliers.
This calculator uses standard factors: 1,000 g = 1 kg, 1,000,000 g = 1 tonne, and 1 g = 1,000 mg. For US customary units, 1 g ≈ 0.03527396195 oz and 1 g ≈ 0.00220462262185 lb. These constants help compare labels quickly.
For reference, 28.349523125 g equals 1 oz, and 453.59237 g equals 1 lb. If you export CSV, raw values are included for calculations, while the PDF summarizes inputs and settings for record keeping in audits or reports.
In food prep, spice portions often fall between 0.1 g and 5 g, while flour or rice measurements commonly sit around 50–500 g per recipe step. In laboratories, micro‑scale work may be recorded in mg or µg, where 1 g = 1,000,000 µg, making scientific notation useful.
Decimals control how many places appear, while significant figures control how many meaningful digits remain. For example, 0.001234 kg can be shown as 0.001234 (six decimals) or as 0.00123 (three significant figures). Use significant figures when your scale accuracy is specified.
Nearest rounding is ideal for general reporting. Floor can be useful when you must not exceed a limit, such as a packaging target mass, while ceil is helpful when you must meet a minimum. Keep rounding consistent across a dataset so totals and averages remain comparable.
When values become very small or very large, scientific notation reduces reading errors. For example, 0.000001 g becomes 1.000000E-06 g. It is especially helpful when converting grams to tonnes (g ÷ 1,000,000) or grams to micrograms (g × 1,000,000).
Custom units let you convert grams into any “unit per gram” factor. If one bag is 50 g, then 1 g = 0.02 bags, so enter 0.02 as the custom factor. This is handy for production runs, dosing schedules, and inventory counts.
Double‑check direction: mg and µg multiply, kg and tonnes divide. Watch for mixing oz (mass) with fluid ounces (volume). If you switch to pounds, remember 1 lb ≈ 453.59237 g, so a 500 g sample is a little over 1.10 lb. Use the example table to sanity‑check results.
Every conversion is target = grams × factor. The factor is the number of target units per gram, such as 0.001 for kilograms or 0.03527396195 for ounces.
Mass values are typically non‑negative in measurement logs. If you need to represent a difference, record the signed change separately and convert the magnitude here.
Jewelry carats use 1 ct = 0.2 g. That means ct = g × 5, so 2 g equals 10 ct.
Grains are a traditional mass unit. This tool uses 1 g ≈ 15.4323583529 gr, which helps compare small masses in legacy datasets.
Use it for very small values (µg‑level) or very large scale conversions (tonnes). It reduces zeros and helps prevent missed decimal points.
Yes. If you set significant figures above zero, the display rounds to that digit count, and decimal places become secondary. This matches how measured quantities are usually reported.
Enter “custom units per gram.” If 1 pack weighs 25 g, then 1 g equals 0.04 packs. Use 0.04 as the factor, and optionally name the unit “pack.”
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.