What to look for
Resolution of 1 g or better. A few grams of lye changes the superfat. For small test batches, 0.1 g is worth it.
At least 3 kg capacity. Your bowl plus a full batch of oils adds up quickly.
A tare button and no auto-off under 2 minutes. Scales that switch off mid-pour lose your count.
Precision 5 kg bench scale
Held its reading within 0.1 g across every test weight, and the backlit display stays readable under a wide bowl.
Pros
- + 0.1 g accuracy up to 5 kg
- + Auto-off can be disabled
- + Wipe-clean glass top
Cons
- − Needs AAA batteries
- − Pricier than a kitchen scale
Slim kitchen scale
Accurate to the gram and fine for full-size batches. Too coarse for small test batches.
Pros
- + Accurate to 1 g
- + Thin enough to store in a drawer
Cons
- − Auto-off after 2 minutes
- − Display hides under big bowls
Pull-out display scale
The pull-out display solves the most common beginner mistake, misreading the number under a big bowl.
Pros
- + Display readable under any bowl
- + 10 kg capacity for big batches
Cons
- − 1 g resolution only
- − Bulky
What you don't need
- Jewelry scales
- Too small for oils. Only useful for weighing colorants.
- App-connected scales
- Nice to have, but slower to read and more to go wrong.
FAQ
Can I use my kitchen scale for soap?
Yes, if it reads in 1 g steps and doesn't switch off quickly. Keep a separate scale only if you're worried about lye residue; wiping it down is usually enough.
Do I need a scale that reads 0.1 g?
Only for small batches under about 500 g of oils, or for weighing additives and colorants.
How do I check if my scale is accurate?
Weigh something with a known mass, such as a sealed 500 g pack or new coins (a US nickel is 5.0 g).