Free Candle Making Calculators
Every calculation you need from first pour to finished candle — free, instant, no account required.
Wax Weight Calculator
How much wax to fill any jar or container — by volume or dimensions.
Fragrance Load Calculator
Calculate exact fragrance oil amount for any wax weight and load %.
Wick Size Calculator
Find the right wick series and size for your container diameter and wax type.
Candle Cost Calculator
Full cost-per-candle breakdown: wax, fragrance, wick, container, labels, labour.
Burn Time Estimator
Estimate how many hours a candle will burn based on wax weight and wick size.
Container Volume Calculator
Find the fluid oz / mL capacity of any jar shape before you buy.
Wax Melt Calculator
Fragrance load and wax weight for clamshells, tarts, and snap bars.
Batch Size Scaler
Scale any candle recipe up or down to any number of candles instantly.
Dye Colorant Calculator
Liquid dye drops or dye chip weight per pound of wax for any colour depth.
Profit Margin Calculator
Set your retail price and see gross margin, markup, and break-even quantity.
Fragrance Blend Calculator
Mix up to 5 fragrance oils into a custom blend and get precise weights.
Pour Temperature Guide
Correct melt, add-fragrance, and pour temperatures for every wax type.
Supplies Reference
Reference guide to wax types, fragrance oils, wicks, containers, and essential tools.
About WickCalc
Who built this, why it is free, and how to contact us.
Why use WickCalc?
Getting the ratios right is the difference between a candle that burns beautifully and one that tunnels, pools, or throws no scent. Every calculator on this site is built specifically for chandlers — from beginners pouring their first soy jar candle to small businesses pricing a batch of 500.
What is a fragrance load?
Fragrance load (or fragrance percentage) is the ratio of fragrance oil to wax by weight. Soy waxes typically accept 6–10 %, while some paraffin waxes can hold up to 12 %. Exceeding the wax's maximum fragrance load causes seeping, poor scent throw, and fire hazards. The Fragrance Load Calculator prevents this automatically.
How much wax do I need to fill a jar?
A common rule of thumb is to fill the jar with water to the fill line, note the fluid ounces, then multiply by 0.86 to get the wax weight in ounces (because wax is less dense than water). The Wax Weight Calculator does this automatically for any jar shape.
Choosing the right wick
Wick sizing is the most trial-and-error part of candle making. The Wick Size Calculator gives you a recommended starting series (CD, ECO, Wooden, etc.) and size based on your container diameter and wax type — saving you several test pours.