Grams to oz Converter
Convert grams to ounces for following American recipes and reading US nutrition labels.
How It Works
Formula: g to oz = value × 0.0352739619
Example: 100 g = 3.527396 oz
Note: 1 gram equals 0.035274 ounces under the avoirdupois standard used in American cooking.
Common Uses
Quick Conversion Table
| g | oz |
|---|---|
| 1 | 0.0353 |
| 5 | 0.1764 |
| 10 | 0.3527 |
| 25 | 0.8818 |
| 50 | 1.7637 |
| 100 | 3.5274 |
| 150 | 5.2911 |
| 200 | 7.0548 |
Rounding Rule
Rounded to 4 decimal places
Error Margin
±0.0001 oz
Precision Guidance
For recipes, round to 0.1 oz. For precise nutrition tracking, keep 2-4 decimals.
Common Mistakes
Use the avoirdupois ounce (28.35 g) for food, not the troy ounce (31.10 g) used for gold.
Frequently Asked Questions
What is 100 grams in ounces?
100 grams equals 3.5274 ounces using the standard conversion (1 g = 0.03527396 oz).
How do I convert grams to ounces?
Multiply the gram value by 0.035274. For example, 100 g × 0.035274 = 3.5274 oz.
Is this for cooking or precious metals?
This uses the avoirdupois ounce for cooking and everyday weight, not the troy ounce for precious metals.
How precise is this for baking?
Accurate to 4 decimal places; for baking, rounding to 0.1 oz is typical.
Deep Dive Guide
Grams to Ounces: Convert Grams to Ounces for Cooking and Packaging
Convert grams to ounces with the exact 0.035274 factor. Translate metric recipe weights, portions, and packaging values into US ounces.
Read Full Guide →More Converters You May Like
150 lbs to kg Converter
Exact conversion of 150 pounds to kilograms for American fitness tracking and body weight management.
120 lbs to kg Converter
Precise conversion of 120 pounds to kilograms for female weight management and fitness goals.
180 lbs to kg Converter
Accurate conversion of 180 pounds to kilograms for male gym training and body mass tracking.
Exact Constants & Authoritative Sources
Every conversion on this page uses the fixed, internationally agreed constants below — drawn from NIST and the SI Brochure. No values are estimated or rounded as if exact. See the full list on our Sources & Standards page.
- EXACT1 pound (lb, avoirdupois) = 0.45359237 kilograms (exact)
- EXACT1 ounce (oz, avoirdupois) = 28.349523125 grams (exact, 1/16 lb)
- EXACT1 stone (st) = 6.35029318 kilograms (exact, 14 lb)
- EXACT1 short ton (US) = 907.18474 kilograms (exact, 2000 lb)
Common Pitfalls & How to Avoid Them
Mass vs. weight
The pound and kilogram are units of MASS, not force. On Earth, mass and "weight" read the same number in practice, but a 70 kg mass weighs less on the Moon. UnitFig converts mass; for scientific force you need newtons (1 lbf = 4.4482216152605 N, exact).
Avoirdupois vs. troy ounce
Cooking and body weight use the avoirdupois ounce (28.349523125 g). Gold and precious metals use the troy ounce (31.1034768 g). Never mix them — the error is about 10%.
Rounding the factor
Using 2.2 instead of the exact 2.20462262 overstates small errors at large values. For medical dosing or competition weight classes, keep the full factor or use a converter.
A unit-conversion reference site has no manufacturer-specific or device calibration parameters, so "layered tuning" does not apply here. The only real error-handling is input validation: the converter rejects non-numeric, empty, or out-of-range entries and shows a clear message, then falls back to exact constants above. No estimated or rounded figures are ever presented as exact.
Authoritative sources for this page
- NIST (U.S. National Institute of Standards and Technology) — NIST SP 330 — The International System of Units (SI), 2019 edition
Last Updated 2026 | This converter was reviewed for accuracy