Recipe scaler — paste any recipe, change servings, get all ingredient amounts auto-scaled. Handles fractions and unit conversion.
- Runs locally
- Category Calculator
- Best for Getting a realistic range before a purchase, plan, workout, or schedule decision.
150 g all-purpose flour 100 mL whole milk 1 piece eggs ½ tbsp olive oil ¼ tsp salt ½ cup sugar 180 °C bake for 30 min
Parsed lines
| # | original | scaled | unit | ingredient |
|---|---|---|---|---|
| 1 | 300 | 150 | g | all-purpose flour |
| 2 | 200 | 100 | mL | whole milk |
| 3 | 2 | 1 | piece | eggs |
| 4 | 1 | ½ | tbsp | olive oil |
| 5 | ½ | ¼ | tsp | salt |
| 6 | 1 | ½ | cup | sugar |
What this tool does
A practical recipe scaler for the situation every home cook hits at least once a month: the recipe is written for 4 people but you're cooking for 2, or for 6, or for one. Paste any ingredient list, type the original servings and the target servings, and every quantity is re-computed at once with the right unit kept on the right line. Parses real-world recipe text — "300 g 面粉", "1 1/2 cups flour", "2 tbsp olive oil", "1/2 tsp salt", "2 个鸡蛋" — and understands the formats home cooks actually paste: integers, decimals, mixed fractions like 1 1/4, and the unicode fractions ½ ⅓ ⅔ ¼ ¾ ⅛ that most converters silently drop. Eggs, slices, cloves, and other countable items are rounded to whole numbers so you don't end up with "1.33 eggs". Quantities are pretty-printed back as fractions when the result lands on a clean ½ / ⅓ / ¼ — keeps the page readable and grocery-list friendly. Lines without a number (the prose steps, "salt to taste", "pinch of pepper", "热水适量") pass through untouched. Time and temperature lines aren't touched either — because halving a recipe doesn't halve the oven temperature, and the bake time only nudges. A tip strip at the top spells that out. 100% client-side, no upload, no signup, no API call — paste, type two numbers, copy the scaled list back into your notes app.
Tool details
- Input
- Text + Numbers
- The page exposes text boxes, numeric controls, file pickers, or structured inputs depending on the tool.
- Output
- Live result + Copy
- The result area focuses on usable output, with copy, download, or preview actions when supported.
- Privacy
- Browser-side processing
- The main tool logic does not call an external API, so inputs normally stay in the current tab.
- Save / share
- No account required
- Open the page and use it; whether results survive refresh depends on the tool.
- Performance budget
- Initial JS <= 18 KB
- No WASM budget is declared, keeping the tool quick to open on mobile.
- Best fit
- Calculator · Student
- Category and role tags drive related tools, internal links, and quick fit checks.
How to use
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1. Input
Paste or drop your content into the tool panel.
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2. Process
Click the button. All processing is local in your browser.
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3. Copy / Download
Copy the result or download to disk in one click.
How Recipe Scaler fits into your work
Use it for fast estimates, comparisons, and planning numbers before you make the final call.
Calculation jobs
- Getting a realistic range before a purchase, plan, workout, or schedule decision.
- Comparing scenarios by changing one input at a time.
- Turning rough assumptions into a number you can discuss.
Calculation checks
- Double-check units, dates, rates, and rounding assumptions.
- Treat health, finance, tax, and legal outputs as planning aids, not professional advice.
- Save the inputs that produced an important result so you can reproduce it later.
Good next steps
These links move the current task into a more complete workflow.
- 1 Unit Converter Convert between length, weight, temperature, area, volume, speed, time — instant, browser-only Open
- 2 Cooking Unit Converter Cooking unit converter — tsp / tbsp / cup / oz / ml / g for 100+ common ingredients with density. Open
- 3 Calorie Calculator Calorie calculator — daily calorie needs (BMR + TDEE), weight loss/gain targets, macro breakdown. Open
Real-world use cases
Cooking a 4-person dinner recipe for two on a weeknight
You found a braised chicken recipe written for 4 but it's just you and your partner. Paste the ingredient list, set original servings to 4 and target to 2. The 600 g chicken becomes 300 g, 3 cloves garlic round to 2 (not 1.5), and salt to taste stays as-is. Copy the halved list into your notes and shop from that.
Doubling a cake recipe to bake two layers at once
Your sponge recipe makes one 8-inch layer but the birthday needs two. Set original to 1 and target to 2: 150 g flour becomes 300 g, 2 eggs becomes 4, and the half tsp baking soda prints back as 1 tsp. The oven temperature line stays untouched, and the top tip reminds you to use two tins, not one giant pan.
Common pitfalls
Typing servings as Chinese numerals; the parser only reads Arabic digits, so write 1 or 0.5.
Expecting the bake time and oven temperature to halve when you halve the recipe; they don't, and the tool leaves those lines alone on purpose.
Pouring a doubled batter into the original tin instead of scaling pan area; the math is right but the cake bakes unevenly.
Privacy
Everything runs in your browser. The recipe text you paste is parsed, scaled, and formatted locally, with no upload, no server call, and no tracking on what you type. After the page loads once it works offline, and nothing about your recipe leaves this device.
FAQ
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