oz to g Converter
Convert kitchen ounces into precise gram amounts
Ounces to grams FAQ
How do you convert ounces to grams exactly?
This converter uses the international avoirdupois ounce, which is the common kitchen and shipping ounce. By definition, 1 oz = 28.349523125 g, so the calculator simply multiplies your ounces by that factor. For quick mental maths you might use 28.35, but the tool keeps the full precision that recipe developers, roasters and lab work often need.
Is this the same ounce used in baking recipes?
Yes. Most cookbooks and US-style recipes use the regular avoirdupois ounce for dry ingredients like flour, sugar, nuts and chocolate chips. That’s the same ounce used here. Precious metals sometimes use a troy ounce, which is heavier (about 31.1 g), but everyday kitchen and parcel scales are almost always calibrated in ordinary ounces.
Why do nutrition labels usually show grams instead of ounces?
Nutrition regulations and food standards are based on the gram (g), a metric unit equal to one thousandth of a kilogram. That makes it easier to compare products and serving sizes across countries, because everything is expressed in the same SI-based unit. The converter lets you keep thinking in ounces while still matching the grams listed on packages and labels.
What’s 1 oz in grams for coffee or spices?
One standard ounce is about 28.35 g. Coffee roasters, bartenders and home cooks often round to 28 g when scaling recipes, but if you want to be precise for espresso dosing, spice blends or small-batch cosmetics, the calculator uses the full 28.349523125 g definition.
Can I trust this for small parcel and postage weights?
Yes. Postal services and couriers increasingly use grams and kilograms internally, even if your shipping label interface still shows ounces and pounds. Because the oz to g conversion is based on the same standards used by metrology labs and regulators, you can copy the result directly into forms that ask for grams.
What about converting fluid ounces to grams?
This tool is for ounces of mass, not fluid ounces of volume. To go from fluid ounces to grams, you need the liquid’s density as well as its volume. For example, 1 fl oz of water is close to 29.6 g, but 1 fl oz of oil or syrup will give a different gram value.
From cups and ounces to precise gram weights
This oz to g converter is designed for the moments when a recipe, blog post or shipping form shows ounces but your kitchen scale, food tracker or online store wants grams. Instead of hunting through conversion tables or dividing by rough rules of thumb, you type the number of ounces, hit convert, and instantly see a clean line such as “8 oz = 226.796 g” that you can read at a glance.
1. Simple one-box design for kitchen and shipping
The layout is intentionally minimal: one field labeled Ounces (oz) and a result card underneath. You can enter whole ounces or decimals like 0.5 oz, 1.25 oz or 3.7 oz, which is especially useful for coffee doses, supplement scoops and small parcels. The converter applies the international ounce definition automatically so your ounces-to-grams line matches the standards used by digital scales and regulatory tables.
If you ever need the reverse direction, the “Swap Units” button jumps you straight to the g to oz page, keeping the same clean look and making it fast to switch between metric and imperial thinking as you cook or pack.
2. Exact factor: 1 oz = 28.349523125 g
Under the hood, the tool uses the standard relationship 1 ounce (oz) = 28.349523125 grams (g), agreed internationally for the avoirdupois ounce. That factor is what measurement institutes and technical references use, so your conversions line up with professional recipe development, food safety guidelines and postal pricing.
For more complex conversions, like pounds, kilograms or tonnes, you can move over to the full weight conversion calculator and still get results that follow the same underlying definitions.
3. Common oz to g values at a glance
Here are some quick reference conversions the calculator reproduces, handy for sanity-checking results or scribbling in the margin of a cookbook:
| Ounces (oz) | Grams (g) |
|---|---|
| 1 oz | 28.35 g |
| 2 oz | 56.70 g |
| 4 oz | 113.40 g |
| 8 oz | 226.80 g |
| 12 oz | 340.19 g |
| 16 oz (1 lb) | 453.59 g |
A rough mental shortcut is to multiply ounces by 30 and subtract about 5–10%. For instance, 4 oz → 120 g minus a bit ≈ 113 g. The converter removes the guesswork by using the exact number whenever you need proper accuracy.
4. Everyday uses for the oz to g converter
You will reach for this page any time imperial and metric measurements collide:
- Baking and pastry — convert US-style ounces into grams for scales and professional formulas.
- Nutrition tracking — match serving sizes in ounces with grams on labels and in apps.
- Coffee and tea — translate recipe doses for beans, grounds and loose leaf tea into grams.
- DIY cosmetics and candles — mix oils, waxes and fragrances with gram-level precision.
- Small parcel shipping — turn ounce readings from a kitchen scale into grams for courier forms.
Because the underlying ounce and gram definitions are fixed and internationally recognised, this ounces to grams converter gives you consistent, reproducible results whether you are baking once a month or running a busy kitchen, roastery or online shop every day.
References and further reading on oz and g
These references explain how the common ounce and the gram are defined and used:
- Ounce — describes the international avoirdupois ounce and its exact conversion to grams in modern measurement systems.
- Gram — covers the gram as a metric unit of mass equal to one thousandth of a kilogram in the SI system.
- SI Units — Mass (NIST) — explains how mass units like the kilogram and gram fit into the International System of Units used in science and industry.
For regulated labelling, trade or compliance work, always follow the specific rounding rules and unit requirements laid out in your local standards and official documentation.