Soap Making Scale: What Readability You Need for Lye, Oils and Fragrance
A soap making scale should read in grams with room for your pot plus the batch, and for lye and fragrance to 0.1 g we recommend the Adam Core CQT 2601 (2600 g x 0.1 g), on sale for $328.99 (regular $480.00), in stock.
Reviewed by MNM Scales technicians · Updated November 4, 2026 · Prices checked November 4, 2026
Short answer: soap recipes are written by weight, so pick a scale that reads in grams with a capacity above your mixing pot plus the batch. For small batches where lye, fragrance and colorant matter to the tenth of a gram, the Adam Core CQT2601 (2600 g x 0.1 g) is $328.99. For larger batches of oils, the Adam Core CQT5000 (5000 g x 1 g) is $231.99. Buy it calibrated: call (832) 290-3120.
This guide is for home and small-business soap makers, candle and cosmetic shops, and classrooms choosing a soap making scale. MNM Scales has sold, calibrated and repaired scales for over 30 years from our shop in Cypress, Texas, and we are one of the largest scale distributors.
Why a soap making scale weighs, not measures
Cold-process and hot-process recipes list oils, water and lye (sodium hydroxide for bars, potassium hydroxide for liquid soap) by weight, because the lye amount is calculated from the exact weight of each oil. Cups and spoons change with temperature and how you pour, so a digital scale that reads in grams is the tool for the job. Tare the empty container, add one ingredient, write the reading down, and tare again.
Readability and capacity for your batch
| Batch size (total oils) | Readability to look for | Capacity to look for |
|---|---|---|
| Test batches up to about 500 g | 0.1 g | At least 2000 g, so the pot fits on the pan |
| Standard loaf molds, 500 g to 1.5 kg | 0.1 g for lye and fragrance; 1 g for oils | 2600 g to 5000 g |
| Production batches over 2 kg | 1 g for oils; 0.1 g where small additions matter | 5000 g to 15 kg |
Count the container: a stainless pot can weigh 1 kg or more on its own, so add it to the batch weight before you pick a capacity. Many makers keep two scales: a 0.1 g scale for lye, fragrance and colorants, and a larger 1 g scale for oils.
Soap making scale models compared at live prices
| Model | Capacity x readability | Pan | Key features | Price |
|---|---|---|---|---|
| Adam Core CQT2601 | 2600 g x 0.1 g | 145 mm (5.7 in) stainless | Six AA batteries or AC adapter; ShockProtect overload protection; dual tare keys; backlit LCD | $328.99 |
| Adam Core CQT5000 | 5000 g x 1 g | 145 mm (5.7 in) stainless | Six AA batteries or AC adapter; ShockProtect overload protection; dual tare keys; backlit LCD | $231.99 |
| Sartorius PRACTUM5101-1S | 5100 g x 0.1 g | Precision balance pan | Monolithic weigh cell; mechanical overload protection; counting and checkweighing; RS232 | $929 |
| A&D EK-15KL | 15 kg x 0.1 g | 300 x 210 mm (11.8 x 8.2 in) stainless | 0.1 g over the full range for big pots; comparator; RS-232C; AC adapter | $549 |
Browse Adam Equipment scales, or see our lab scale guide for more compact and precision balances.
Using a scale safely around lye
- Set the scale on a level, dry counter away from the sink and the stove.
- Put a lye-safe container (stainless or heavy plastic) on the pan and press tare.
- Pour the lye slowly, wearing gloves and eye protection, and stop at the recipe weight.
- Wipe the pan and housing with a damp cloth after each session; lye dust left on the pan will skew later readings.
- Check the scale with a known test weight before each batch day.
Handling stronger chemicals or making cosmetics in volume? Our chemical weighing scale guide covers sealed and washdown options.
Rules: selling soap by weight
Weighing ingredients for your own recipes is in-house use. If you sell bars or loaves by weight, or print a net weight on the label from your own scale, that weighing is commercial and the scale has to be legal for trade. The models in this guide are non-NTEP, so call us for a legal-for-trade scale if you sell by weight. Need it legal for trade? Here is an NTEP alternative: A&D EK-15KLN. Our NTEP guide explains the certificate, and we handle legal-for-trade scale calibration in Texas.
Texas note: TDA does not require an NTEP certificate for every device, but the scale must meet NIST Handbook 44 and suit its use; some scales do need one, so we recommend NTEP models and can check yours. See TDA’s scales used in trade guidance (PDF) and our TDA scale certification guide, or call us or TDA to confirm your use.
Calibration and rental
- CQT2601, CQT5000 and PRACTUM5101-1S calibration add-ons: our TDA-registered technicians calibrate your scale in-house before it ships. Add in-house calibration with a certificate ($195) or NIST calibration with a NIST-traceable certificate ($495). See NIST vs in-house certificates.
- EK-15KL calibration add-ons: in-house calibration with a certificate ($250) or NIST-traceable calibration ($595).
- Other soap and cosmetic scales: call for a quote.
- On-site service: $295 + $2 per mile per visit across the Houston area, plus calibration per scale; see on-site calibration and balance calibration in Houston.
- Mail-in, repairs and rentals: use mail-in calibration, have us repair the brands we sell, and rent all types of scales while yours is in for service.
Not sure which soap making scale fits? Tell us your batch size, your heaviest pot and whether you sell by weight. We will match the scale and ship it calibrated. Calibration weights, containers and covers are not included unless the listing says so. Shop: 21249 FM 529 Rd, Cypress, TX 77433, visits by appointment.
Frequently asked questions
What readability do I need for a soap making scale?
0.1 g for small batches and for lye, fragrance and colorants. 1 g works for weighing oils in larger batches.
What capacity soap making scale should I buy?
Add the weight of your empty pot to the full batch and pick the next capacity up. 2600 g to 5000 g covers most loaf molds; 15 kg suits production pots.
Can I weigh lye on a kitchen scale?
Use a scale that reads in grams with a fine enough step for your batch, tare a lye-safe container first, and keep the scale clean and dry.
Do I need a legal-for-trade scale to sell soap?
Only if you sell by weight or print a net weight from your own scale. The models in this guide are non-NTEP, so call us for a legal-for-trade option.
Should I use one scale or two?
Many makers use a 0.1 g scale for lye and additives and a larger 1 g scale for oils, so each reading sits well inside the scale’s range.
Do you calibrate soap making scales?
Yes. For the CQT2601, CQT5000 and PRACTUM5101-1S, in-house calibration with a certificate is $195 and NIST-traceable is $495. For the EK-15KL it is $250 and $595. For other models, call for a quote.