Simple formula
Divide liquid oil weight by 0.80 to match the fat carried by ordinary butter.
The scale-first conversion
Oil to Butter in Grams
Grams remove cup packing and regional cup-size ambiguity. Enter the oil weight directly for the cleanest fat-matched result.
The exact weight formula is oil grams ÷ 0.80. That makes 100 g oil equal 125 g butter.
Use
1.3 g
Which is also
- 0 cups
- ⅛ tbsp
- 0 sticks
- Butter is about 80% fat, so you need more of it by weight to carry the same fat as oil.
- About 80% fat, 16-17% water and milk solids. The water is why butter and oil are not a straight swap.
Show the maths
| Formula | 1 g × 1 fat ÷ 0.8 fat = 1.25 g |
|---|---|
| Source | 1 g · 1 g fat |
| Result | 1.25 g · 1 g fat |
| Ratio | ×1.25 |
Common amounts
Oil grams to butter grams
| Source | Quick | Exact | Exact grams |
|---|---|---|---|
| 25 g | 32.5 g | 31.3 g | 31.25 g |
| 50 g | 65.1 g | 62.5 g | 62.5 g |
| 60 g | 78.1 g | 75 g | 75 g |
| 80 g | 104 g | 100 g | 100 g |
| 100 g | 130 g | 125 g | 125 g |
| 125 g | 163 g | 156 g | 156.25 g |
| 150 g | 195 g | 188 g | 187.5 g |
| 200 g | 260 g | 250 g | 250 g |
| 250 g | 325 g | 313 g | 312.5 g |
What matters in the kitchen
How to use this conversion
No density step
Because both sides are already weights, oil density and cup standards do not enter the calculation.
Weigh accurately
Place the mixing bowl on the scale, tare it, and add butter to the displayed gram value.
Questions about this tool
Oil to Butter in Grams FAQ
What is the key result from the Oil to Butter in Grams?
The exact weight formula is oil grams ÷ 0.80. That makes 100 g oil equal 125 g butter.
What should I keep in mind when using this oil to butter in grams?
European-style and reduced-fat butters can differ from the 80% baseline; check the package when precision is critical.
Simple formula: what does that mean?
Divide liquid oil weight by 0.80 to match the fat carried by ordinary butter.