Percent w/w to g/100g Converter Calculator

Turn any percent weight by weight into grams per hundred grams fast with smart validation worked examples and batch planning tools including reverse calculations printable notes unit guidance and accuracy checks designed for lab work cosmetic formulations classroom practice and food science professionals seeking reliable clear results with audit trail fields and quick charts

Calculator % w/w → g per 100 g
Enter the percentage concentration by weight. Must be between 0 and 100.
Please enter a number from 0 to 100.
By definition, % w/w equals grams of solute in every 100 grams of mixture.

Batch planner (optional)
If provided, the tool computes solute and solvent masses for the batch.
Tip: Press Enter to calculate.
Formulas and Definitions

Weight percent (% w/w) expresses the mass of solute per 100 grams of total mixture.

  • % w/w = (masssolute / massmixture) × 100
  • g per 100 g = % w/w (numerically identical by definition)
  • masssolute = (% w/w ÷ 100) × massmixture
  • masssolvent = massmixture − masssolute

Units should be consistent (grams). This tool rounds display values but keeps full precision internally for accuracy.

Worked Examples
% w/w g per 100 g Batch (g) Solute (g) Solvent (g)
0.10000.1000500.00000.5000499.5000
1.00001.0000250.00002.5000247.5000
5.00005.00001,000.000050.0000950.0000
10.000010.0000200.000020.0000180.0000
35.000035.0000100.000035.000065.0000
Note: % w/w equals g/100 g; table repeats values for clarity.
Quality and Notes
  • Client-side and server-side validation for robust results.
  • Precision handling with configurable decimal places.
  • CSV download for documenting calculations.
  • Copy-to-clipboard for quick sharing.
Always verify units. For dense materials, consider volume-to-mass conversion separately.
FAQs
1) What does % w/w mean?

It indicates grams of solute present in every 100 grams of total mixture. The figure is mass based, not volume based.

2) Is % w/w the same as g per 100 g?

Yes. Numerically % w/w equals grams of solute per 100 grams of mixture, so the conversion is one to one.

3) Can this tool plan a custom batch?

Enter the desired percentage and total batch mass to compute exact solute and solvent quantities in grams.

4) Why does the output round numbers?

Display values are rounded for readability. Internal calculations maintain full precision before rounding.

5) What if I need mg or kg?

Convert those units to grams before using the calculator, then convert the outputs back to your preferred units.

6) Does density matter for this calculator?

No. Weight percent uses mass only. If you are converting from a volume basis, you will need density to convert to grams first.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.