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Percent w/v to g/L Converter
↔ Convert g/L to % w/v instead

Common Conversions

% w/v g/L
0.1 1
0.5 5
0.9 9
1 10
2 20
5 50
10 100
15 150
20 200
25 250
50 500

Why this conversion matters in chemistry

Percent w/v is grams of solute per 100 mL of solution; g/L is grams per 1000 mL. A factor of 10 between the two falls straight out of that volume difference. Normal saline at 0.9% w/v is 9 g/L of NaCl. Five-percent dextrose is 50 g/L. Once a label-strength concentration lands in g/L, the next step is usually to compute molarity (g/L divided by molar mass), so this conversion sits one move away from a fully mole-based calculation. The arithmetic is trivial — but the conversion is the bridge between consumer-facing labels and the lab math behind them.

Formula

g/L = % w/v × 10

Worked Examples

1% w/v = 10 g/L

The conversion anchor — one gram per 100 mL is exactly ten grams per liter.

0.9% w/v = 9 g/L

Normal saline — isotonic 0.9% NaCl, the standard IV-fluid concentration.

5% w/v = 50 g/L

Five-percent dextrose in water, one of the most common IV maintenance fluids.

10% w/v = 100 g/L

A concentrated reagent stock — SDS, for instance, is often prepared at 10% w/v as a working solution for protein chemistry.

Frequently Asked Questions

How do I convert % w/v to g/L?
Multiply by 10. So 0.9% w/v becomes 9 g/L — the value behind the most common IV-saline preparation. The factor is exact through the unit definitions.
What does % w/v actually mean?
Weight per volume percent — grams of solute in 100 mL of solution. So 1% w/v is 1 g in 100 mL, which scales up to 10 g/L. The notation predates SI and survives mostly in clinical and pharmaceutical contexts.
What is 0.9% NaCl in g/L?
Normal saline at 0.9% w/v is 9 g/L of NaCl, equivalently 9 mg/mL or 154 mM. The mM value matches plasma sodium concentration, which is what makes the solution isotonic.
How does % w/v relate to molarity?
Molarity is (% w/v × 10) ÷ MW. So 5% glucose at a 180 g/mol molar mass works out to 50 / 180 = 0.278 M, which is what a metabolic-flux calculation actually wants on the right-hand side.