Chocolate Tempering Calculator: Seed Amount and Temperatures
Calculate how much chocolate to melt, how much tempered seed to reserve or add, and the melt–cool–work curve for your method. Choose dark, milk, white or Ruby chocolate; use grams, ounces, kilograms or pounds, and Celsius or Fahrenheit. All calculations run in your browser.
Before you start: Check the ingredients for cocoa butter and the package’s tempering instructions. Use real chocolate, ideally couverture, and seed that is already in temper. Compound coatings and candy melts usually need only melting; low-cocoa-butter baking chips may stay too thick for dipping. Keep all equipment dry.
Choose your batch and method
Includes chocolate to reserve as seed. Change the meaning in batch options below.
Your batch at a glance
Calculating…
Already melted? Batch options & advanced settings
Finished weight is a planning estimate before unused seed, bowl and test losses.
Benchmark presets are starting points. Follow the instructions for your exact product and method. Changing type or method reloads benchmark fields; turn this option on to edit.
Your numbered kitchen plan
Temper-test results: pass, fail and next actions
Start a 3–5 minute timer after spreading a thin sample on dry parchment or dipping a clean, dry spatula. This is an approximate first check in a cool, dry room around 18–20°C (64.4–68°F), not a promise that a whole mold will set in that time.
Pass: an even, glossy, firm set with no streaks or tackiness. Proceed, keeping the bowl in its working range.
Slow setting or softness: try a cooler, dry testing spot and verify temperature. If it still fails, re-temper and test again.
Streaks: check the seed’s condition and thermometer, stir thoroughly and re-temper before using the batch.
Excessive thickness: gently warm within the working range and stir. Persistent thickness can mean over-crystallization or low-fluidity chips; follow product guidance or restart. Do not add water.
Unmelted seed: remove remaining pieces at the target. Never overheat the batch just to dissolve them; usable yield will be smaller.
How to use the chocolate tempering plan
Check the chocolate. Use real cocoa-butter chocolate and dry equipment. Seed must already be in temper. Check the package curve and use a scale, dry heatproof bowl, spatula and accurate thermometer.
Select the method and amount. Choose classic seeding, microwave/incomplete-melt, tabling or Callets/melter. Enter the weight and unit. In batch options, specify total available, desired finished batch or chocolate already melted.
Prepare the portions. Classic seeding reserves 25% of the total by default. Callets/melter starts with 5% of the melted portion as additional seed. Microwave uses tempered solid chocolate without a separate seed allocation; tabling melts the whole batch.
Follow your numbered plan. Classic seeding melts, cools with seed and gently rewarms. Tabling cools two-thirds on a dry slab before recombining. The melter method adds seed near 40°C and approaches working temperature directly. Microwave tempering preserves crystals by stopping heat while small pieces remain.
Test and hold. Spread a thin sample or dip a dry spatula. Check after about 3–5 minutes in a cool, dry room: look for an even, glossy, firm set. If soft or streaky, correct conditions or re-temper and retest. Stir and hold within the working range.
Tempering encourages stable cocoa-butter crystals (often called Form V) for a firm set and shine. Temperature, stirring and a successful sample test all matter.
Chocolate Tempering Temperature Chart
These full melt–cool–work benchmarks apply to classic seeding and tabling. Dark, milk and white use Valrhona’s table; Ruby uses Callebaut’s published benchmark table. The melter and microwave plans have different paths. Product instructions take priority.
Chocolate
Melt
Cool
Work
Dark
50–55°C 122–131°F
28–29°C 82.4–84.2°F
31–32°C 87.8–89.6°F
Milk
45–50°C 113–122°F
27–28°C 80.6–82.4°F
29–30°C 84.2–86°F
White or blond
45–50°C 113–122°F
26–27°C 78.8–80.6°F
28–29°C 82.4–84.2°F
Ruby (Callebaut)
45°C 113°F
27°C 80.6°F
28.5–29.5°C 83.3–85.1°F
For the Callets/melter preset, melt at 45°C (113°F), add seed near 40°C (104°F), and stir toward about 31°C (87.8°F) for dark or 29°C (84.2°F) for milk/white. Ruby uses its separately sourced working range. Microwave mode uses only the working range as a conservative ceiling; it does not heat to the full-melt benchmark.
Seed amount formulas and worked examples
Let T be the planned combined total, M the melted portion, S the seed and p the percentage. “Total available” and “desired finished batch” use the same allocation; finished yield can be lower if you remove seed or leave chocolate in the bowl.
Percent of total: seed = total × p ÷ 100; melted = total − seed.
Percent of melted, starting with a total: seed = total × p ÷ (100 + p); melted = total × 100 ÷ (100 + p).
Already melted, percent of melted: seed = melted × p ÷ 100; combined total = melted + seed.
Already melted, percent of total: seed = melted × p ÷ (100 − p); combined total = melted + seed.
Classic seeding: 25% of the total
Common batches, with the seed reserved from the total
Total
Seed calculation
Kitchen instruction
100 g
100 × 25 ÷ 100 = 25 g
Melt 75 g; reserve 25 g.
250 g
250 × 25 ÷ 100 = 62.5 g
Melt 187.5 g; reserve 62.5 g.
500 g
500 × 25 ÷ 100 = 125 g
Melt 375 g; reserve 125 g.
1 lb (16 oz)
16 × 25 ÷ 100 = 4 oz
Melt 12 oz (0.75 lb); reserve 4 oz (0.25 lb).
1,000 g
1,000 × 25 ÷ 100 = 250 g
Melt 750 g; reserve 250 g.
For each classic example, melt the base to the selected product’s melt range, stir in seed gradually to the cooling range, remove leftovers, gently rewarm and test.
Melter: 5% of the melted portion
500 g already melted: seed = 500 × 5 ÷ 100 = 25 g. Add up to 25 g tempered Callets near 40°C (104°F), stir toward working temperature and test. The planned combined batch is 525 g.
500 g total available: seed = 500 × 5 ÷ 105 ≈ 23.81 g. Melt 476.19 g and reserve 23.81 g, then follow the melter process. For 1,000 g total, melt 952.38 g and reserve 47.62 g.
Already melted, but seed is a share of the total
With 500 g already melted and a 25%-of-total setting, seed = 500 × 25 ÷ 75 ≈ 166.67 g. Add up to 166.67 g seed for a planned 666.67 g combined batch using the classic curve. Adding just 125 g would make seed 20% of the combined total, not 25%.
These are mass allocations, not predictions of how much seed will dissolve. The method, temperature of the seed and room conditions determine the practical addition.
Tempering Checks and Troubleshooting
Seed melts too quickly
The chocolate may still be too warm to establish enough stable crystals. Check the thermometer, stir continuously, and follow the chosen method rather than adding heat.
Seed will not finish melting
Once the target is reached, remove remaining pieces or warm the chocolate only enough to enter the working range. Do not chase every piece with excess heat.
Chocolate is thick
It may be too cool, over-crystallized, or naturally low in fluidity. Gently return it to the working range. Do not add water.
Finish is dull or streaky
Recheck the full curve, thermometer accuracy, seed condition, agitation, and setting environment. Re-temper before molding another full batch.
Frequently asked questions
How much seed chocolate should I use?
Start with the selected method: classic seeding reserves 25% of the total; the Callets/melter preset starts at 5% of the melted portion. These are different processes. Match the percentage and its basis to your product instructions, stop at the target, remove leftover pieces and test.
What is the difference between percent of total and percent of melted chocolate?
Percent of total includes seed in the denominator. Percent of melted compares seed only with the melted base. Thus 5% of the melted portion is about 4.76% of the combined total. The worked examples show both formulas.
Can chocolate chips be tempered?
Some can, if they are real chocolate containing cocoa butter. Baking chips may be formulated to retain their shape and have low fluidity, making them poor choices for thin coatings. Check the ingredients and manufacturer instructions; couverture is usually easier to work with.
Do candy melts need tempering?
Most candy melts and compound coatings use other fats and do not require cocoa-butter tempering. Follow their package melting and setting instructions instead of this calculator.
Can I temper without a thermometer?
Experienced cooks can judge texture and test samples, but temperature by touch is unreliable. An accurate thermometer is strongly recommended, especially for a new product or a small batch.
What if seed pieces remain?
At the method’s target, remove stubborn pieces with a clean, dry utensil. Do not exceed the working ceiling to melt every piece. Any seed you remove or never add reduces the usable batch weight.
How do I hold chocolate at working temperature?
Stir regularly and apply brief, gentle heat only as needed to stay within your product’s working range. Measure the chocolate itself, not just a melter thermostat. Keep water and steam away and repeat the temper test after adjustments.
Can bloomed chocolate be re-tempered?
Dry, otherwise sound chocolate with fat bloom can usually be fully melted and re-tempered using fresh, well-tempered seed or tabling. Do not use bloomed chocolate as seed or for incomplete-melt tempering. Moisture damage and sugar bloom may leave texture problems that tempering alone cannot fix.
What is the difference between fat bloom, sugar bloom and seized chocolate?
Fat bloom is a pale, often smooth or greasy film caused by fat crystallization or migration. Sugar bloom is a rough, grainy surface left when moisture dissolves sugar and then evaporates. Seizing is the sudden thick, clumped texture that can develop when a little water reaches melted chocolate. Re-tempering is not a cure for moisture contamination.
Are my batch details stored?
No. Calculations run locally in your browser. Copy and download happen only when you choose them.
Sources and verification
Last source and formula check: . This is a source-based calculator, not a claim of hands-on testing or review by a chocolatier.
Valrhona: tempering chocolate — the dark, milk and white/blond table values, quarter-batch seeding with gentle rewarming, and two-thirds tabling split. We use its temperature table; its surrounding prose gives a different milk/white melting range, so the product label takes priority.
Callebaut: guide to tempering methods — Ruby benchmark of 45°C → 27°C → 28.5–29.5°C, transcribed from its benchmark table. Fahrenheit values here are calculated from Celsius. This is not a guarantee for every Ruby formulation.
Callebaut: tempering with Callets — the 5% rule near 40°C with seed around 15–20°C and direct approach to working temperature. Seed requirements vary; the default is a planning allowance.
Callebaut: microwave tempering — interrupted heating with stirring and residual pieces. The working ceiling in this tool is a conservative handling limit, not a separate microwave melting curve.
Formula verification uses automated checks of both percentage bases and all three weight meanings, including 375 g + 125 g = 500 g and 500 g + 25 g = 525 g. Checks also cover unit conversion, invalid inputs, method changes, custom curves and agreement between visible FAQs and structured data. These checks verify the calculator, not the physical temper of your chocolate.
