Choose the right formulation calculator

What you will accomplish

You will choose the calculator that matches your current formulation question, open it in the right context, and understand which outputs still require supplier documentation, bench work, or laboratory testing.

Before you start

Identify the decision you need to make and gather the source values it depends on. Use current supplier documents, raw-material specifications, density or assay data, formula yield, and batch results where applicable. Calculator access begins at the tier shown below.

Choose a calculator

1. Open Tools / Calculators. Start from the calculator directory or use a calculator action on a supported formula or batch.
2. Choose the closest task. Match your question to the groups below.
3. Confirm access. Free calculators are available to every account; Maker and Pro calculators require that tier or higher.
4. Enter traceable source values. Keep the supplier document, formula, or batch result behind each input.
5. Review the result in context. Treat the output as formulation support, not as automatic product approval.

Build and balance a formula

• HLB Calculator — Maker — estimates required HLB and emulsifier blends for an oil phase.
• Preservative Calculator — Maker — plans preservative concentration for a water-based product.
• Active Matter Calculator — Maker — balances surfactant active matter in a cleanser or wash.
• Fragrance Load Calculator — Free — screens a proposed fragrance percentage before scale-up or labeling.
• Solubilizer Ratio Calculator — Maker — builds starting ratios for fragrance or other oil-soluble materials in clear systems.

Adjust a formula or production target

• Concentration & Assay Calculator — Maker — handles dilution, assay correction, and carried-solvent contributions.
• pH Adjustment Calculator — Pro — estimates an acid or base correction toward a target pH.
• Neutralization & Thickener Calculator — Maker — estimates neutralizer demand and flags thickener compatibility considerations.

Scale, fill, and evaluate yield

• Unit Conversion Calculator — Free — converts percentages, weights, volumes, and density-based values.
• Density & Fill Calculator — Pro — converts density into fill weights, fill volumes, and declaration targets.
• Overage & Yield Calculator — Pro — projects process loss, starting overage, and saleable yield.

The Density & Fill Calculator and Overage & Yield Calculator can use supported formula or batch context. When you open one from a record, confirm that the prefilled values belong to the formula or batch you intend to evaluate.

In Density & Fill, 0% overfill is a valid explicit choice and stays zero when saved as formula defaults and reopened. The 2% default applies when no overfill value is saved. For example, a 100 mL target at 1 g/mL gives a 100 g setpoint at 0% overfill and 102 g at 2%; confirm the saved value before using the plan. Selecting a packaging variant keeps saved density, overfill and unit-count defaults while applying that variant’s packaging fields.

Use a specialty calculator

• Soap Calculator — Free — calculates NaOH or KOH, water, batch totals, and soap-quality metrics from oil weights.
• SPF Contribution Calculator — Pro — estimates the theoretical contribution of selected UV filters during development.

Apply calculator boundaries

1. Verify inputs before relying on outputs. Incorrect assay, density, SAP, or supplier-limit data produces an incorrect result.
2. Run required bench work. Solubilizer, neutralization, pH, and processing behavior must be confirmed in the actual formula.
3. Complete required testing. Preservative planning does not replace challenge testing, and an SPF estimate does not replace validated SPF testing.
4. Check current supplier and regulatory documents. Fragrance guidance does not replace the applicable supplier certificate or a compliance review.
5. Record the decision. Save the relevant result or conclusion with your development or batch documentation.

Check your work

• You selected the calculator that matches the formulation decision.
• Every input has a current, traceable source.
• Units and concentration bases are consistent.
• Prefilled formula or batch values belong to the intended record.
• The output has the right bench, quality, safety, or regulatory follow-up.

If something does not look right

• If a calculator is locked, compare its minimum tier above with your current subscription.
• If formula or batch values are missing, open the standalone calculator and enter the verified inputs manually.
• If an output is extreme, check units, density, assay, concentration basis, and decimal placement.
• If the calculation and a supplier document disagree, stop and reconcile the source data before proceeding.

Next steps

• Calculate a NaOH or KOH soap recipe
• Scale a saved formula
• Record confirmed calculator decisions in the formula, development record, or batch where they belong.

Overage & Yield uses grams for mass inputs. Formula packaging targets are converted from their declared units before prefilling: ten 200 mL units at 0.9 g/mL require 1,800 g of saleable product, with 180 g per unit. Volume conversions require a saved density; an unknown density does not establish a gram equivalent. Check any general planning fallback before saving. Saved batch yield inputs take precedence over current defaults, and a recorded zero actual yield remains zero for variance calculations.

Numerical checks for packout and yield

A confirmed zero overfill or tare stays zero; leave tare blank when it is unknown. Fill and declaration units must be supported, tare cannot be negative, and calculations reject nonfinite inputs or overflowing results. The yield calculator uses each entered process loss from 0% up to, but excluding, 100%; it does not substitute a lower percentage. A recorded zero actual yield remains a real zero for variance. Volumetric quantities require an explicit density before conversion to grams.