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Quick answer — sugar & pectin for jam
1000 g prepared fruit, 60% sugar (of fruit weight) → 600 g sugar. 1.2% pectin on the 1,600 g fruit+sugar mix → 19.2 g HM pectin. Batch before boil-down ≈ 1,619.2 g. HM acid cue ≈ 1 tbsp lemon juice per kg fruit.
Free jam sugar ratio and pectin calculator for homemade strawberry, berry, and stone-fruit preserves. More on our Food & Cooking hub.
Last updated October 9, 2026
Planning math only—always follow your pectin brand instructions and tested canning recipes for shelf-stable jars.
Typical range is often about 0.5% to 2.0% depending on fruit, sugar, and pectin product.
Sugar
600 g
Pectin
19.2 g
Pre-cook total
1619.2 g
Optional acid cue for HM pectin: about 1 tbsp lemon juice for this fruit amount (adjust by recipe and pH target).
Summary
For 1000 g fruit at 60% sugar, use about 600 g sugar and 19.2 g HM pectin (1.2% of the 1600 g fruit+sugar mix).
Steps
Jam setting note
Actual set depends on fruit acidity (pH), sugar concentration, boil endpoint, and pectin product instructions. Use this as a batch-planning baseline.
Same formulas as the calculator—compare batch size, sugar level, and HM vs LM planning.
| Scenario | Fruit | Sugar | Pectin | Pre-boil total |
|---|---|---|---|---|
| 1 kg fruit · 60% sugar · 1.2% pectin (HM) | 1,000 g | 600 g | 19.2 g | 1,619.2 g |
| 500 g fruit · same ratios | 500 g | 300 g | 9.6 g | 809.6 g |
| Low-sugar HM · 40% sugar · 1.5% pectin | 1,000 g | 400 g | 21 g | 1,421 g |
| 2 kg batch · 60% sugar · 1.2% pectin | 2,000 g | 1,200 g | 38.4 g | 3,238.4 g |
| LM style · 35% sugar · 0.8% pectin | 1,000 g | 350 g | 10.8 g | 1,360.8 g |
Gel depends on pectin, sugar solids, and acidity (pH). This tool focuses on repeatable weight ratios so you can scale batches without cup variance—then confirm set with a plate test and your pectin label.
1. Sugar by fruit weight
Sugar (g) = fruit (g) × (desired sugar % ÷ 100). Example: 1000 g fruit at 60% → 600 g sugar.
2. Pre-cook mix weight
Mix = fruit + sugar. Pectin percentage is usually applied to this mix, not fruit alone.
3. Pectin amount
Pectin (g) = (fruit + sugar) × (pectin % ÷ 100). Example: 1600 g mix at 1.2% → 19.2 g pectin.
4. Total before boil-down
Approximate batch weight ≈ fruit + sugar + pectin (acid and water from fruit not adjusted here).
5. HM acidity cue
High-methoxyl pectin often needs sufficient acid; this tool suggests ~1 tbsp lemon juice per kg fruit for planning.
Sugar = 1000 × 0.60 = 600 g.
Mix = 1000 + 600 = 1,600 g.
Pectin = 1600 × 0.012 = 19.2 g.
Boil to your recipe endpoint; jar yield will be lower after evaporation.
Share it with jam makers and home preservers.
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