Conversion method
Mass of solute per volume of solution only. A mass percentage or ppm by mass needs solution density before conversion; those ambiguous shortcuts are not offered.
g/L = x × 1
10 kg/m³ = 10 g/L.
| kg/m³ | g/L |
|---|---|
| 1 | 1 |
| 5 | 5 |
| 10 | 10 |
| 25 | 25 |
| 50 | 50 |
| 100 | 100 |
Unit definitions and sources
Mass of solute per volume of solution only. A mass percentage or ppm by mass needs solution density before conversion; those ambiguous shortcuts are not offered.
| Unit and system | Use | Definition | Relationship |
|---|---|---|---|
| Kilogram per cubic meter (kg/m³); si | Common units | Kilogram per cubic meter: base (kg-m3) = value × 1. Common use: Solution Mass Concentration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Gram per liter (g/L); si | Common units | Gram per liter: base (kg-m3) = value × 1. Common use: Solution Mass Concentration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Milligram per liter (mg/L); si | Specialist units | Milligram per liter: base (kg-m3) = value × 0.001. Common use: Solution Mass Concentration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Gram per milliliter (g/mL); si | Specialist units | Gram per milliliter: base (kg-m3) = value × 1000. Common use: Solution Mass Concentration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Milligram per milliliter (mg/mL); si | Specialist units | Milligram per milliliter: base (kg-m3) = value × 1. Common use: Solution Mass Concentration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Microgram per liter (µg/L); si | Specialist units | Microgram per liter: base (kg-m3) = value × 1e-06. Common use: Solution Mass Concentration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Kilogram/liter (kg/(L)); other | Specialist units | kilogram/liter = 1000.0 kg-m3, derived from the component SI/customary definitions. Common use: Solution Mass Concentration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Pound/gallon (US) (lb/(US gal)); other | Specialist units | pound/gallon (US) = 119.82642731689663 kg-m3, derived from the component SI/customary definitions. Common use: Solution Mass Concentration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Pound/gallon (UK) (lb/(imp gal)); other | Specialist units | pound/gallon (UK) = 99.7763726631017 kg-m3, derived from the component SI/customary definitions. Common use: Solution Mass Concentration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Pound/cubic foot (lb/(ft³)); other | Specialist units | pound/cubic foot = 16.018463373960138 kg-m3, derived from the component SI/customary definitions. Common use: Solution Mass Concentration. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
Sources: NIST: SP 811 Appendix B.8: conversion factors; BIPM: SI prefixes
Precision of solution mass concentration conversions
All 10 solution mass concentration units convert through Kilogram per cubic meter (kg/m³). 10 have an exact defined relationship to the base unit and 0 are conventional or measured values. Results and the tables on this page come from the same engine, so a table value can be checked against the converter directly.
Standard display shows up to six decimal places, switching to scientific notation for very large or small values. Calculation uses JavaScript binary floating point independently of display rounding, so extra digits are not a claim about measurement accuracy. Each unit lists its own source; a citation records where the definition comes from, not an independent review. See Conversion methodology for the review and correction process.