
Book Spine & Cover Dimensions
Estimate a perfect-bound book’s spine and full cover dimensions from page count, paper caliper and bleed. Compare changes and download a reusable Calvance canvas.
View template and methodSplit a candle batch’s net fill weight into wax and fragrance oil. Compare two wax-based fragrance percentages without changing total fill.

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Net fill includes wax and fragrance, excluding jars and wicks. Candle count is a nonnegative integer, fill weight positive and percentage nonnegative. The 6% and 8% scenarios demonstrate arithmetic, not a recommended recipe.
| Inputs | Default |
|---|---|
| Number of candles | 12 |
| Net fill per candle (g) | 200 |
| Fragrance as a percentage of wax weight (%) | 6 |
Total fill = candles × net grams each. Fragrance percentage uses wax weight as its denominator: wax = total fill ÷ (1 + percentage), fragrance = total fill − wax. Later calculations use the unrounded wax value.
12 [Number of candles] × 200 [Net fill per candle g] → Batch fill g
Batch fill g/(1 + 6 [Fragrance as a percentage of wax weight]%) → Wax g
Batch fill g - Wax g → Fragrance g
Change fragrance load from 6% to 8%. Total fill remains the same; wax falls and fragrance rises. Confirm the actual scale precision and supplier limits before weighing.
| Result | Default | Changed |
|---|---|---|
| Batch fill (g) | 2,400 | 2,400 |
| Wax (g) | 2,264.15 | 2,222.22 |
| Fragrance (g) | 135.85 | 177.78 |
Results are displayed to at most two decimal places; later formulas use unrounded values.
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