Conversion method
Mass-flow rate per area, not total mass-flow rate. Signed flux can represent direction through a surface.
g/(cm²·s) = x × 0.1
10 kg/(m²·s) = 1 g/(cm²·s).
| kg/(m²·s) | g/(cm²·s) |
|---|---|
| 1 | 0.1 |
| 5 | 0.5 |
| 10 | 1 |
| 25 | 2.5 |
| 50 | 5 |
| 100 | 10 |
Unit definitions and sources
Mass-flow rate per area, not total mass-flow rate. Signed flux can represent direction through a surface.
| Unit and system | Use | Definition | Relationship |
|---|---|---|---|
| Kilogram per square meter second (kg/(m²·s)); si | Common units | Kilogram per square meter second: base (kg-m2-s) = value × 1. Common use: Mass Flux Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Gram per square centimeter second (g/(cm²·s)); si | Common units | Gram per square centimeter second: base (kg-m2-s) = value × 10. Common use: Mass Flux Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Kilogram per square meter hour (kg/(m²·h)); si | Specialist units | Kilogram per square meter hour: base (kg-m2-s) = value × 0.0002777777777777778. Common use: Mass Flux Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Pound per square foot hour (lb/(ft²·h)); si | Specialist units | Pound per square foot hour: base (kg-m2-s) = value × 0.0013562298989952916. Common use: Mass Flux Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Gram/second/square meter (g/(s)/(m²)); other | Specialist units | gram/second/square meter = 0.001 kg-m2-s, derived from the component SI/customary definitions. Common use: Mass Flux Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Kilogram/hour/square meter (kg/(h)/(m²)); other | Specialist units | kilogram/hour/square meter = 0.0002777777777777778 kg-m2-s, derived from the component SI/customary definitions. Common use: Mass Flux Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Kilogram/hour/square foot (kg/(h)/(ft²)); other | Specialist units | kilogram/hour/square foot = 0.0029899751157527006 kg-m2-s, derived from the component SI/customary definitions. Common use: Mass Flux Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Kilogram/second/square meter (kg/(s)/(m²)); other | Specialist units | kilogram/second/square meter = 1.0 kg-m2-s, derived from the component SI/customary definitions. Common use: Mass Flux Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Gram/second/sq. centimeter (g/(s)/(cm²)); other | Specialist units | gram/second/sq. centimeter = 10.0 kg-m2-s, derived from the component SI/customary definitions. Common use: Mass Flux Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Pound/hour/square foot (lb/(h)/(ft²)); other | Specialist units | pound/hour/square foot = 0.0013562298989952919 kg-m2-s, derived from the component SI/customary definitions. Common use: Mass Flux Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Pound/second/square foot (lb/(s)/(ft²)); other | Specialist units | pound/second/square foot = 4.88242763638305 kg-m2-s, derived from the component SI/customary definitions. Common use: Mass Flux Density. 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 mass flux density conversions
All 11 mass flux density units convert through Kilogram per square meter second (kg/(m²·s)). 11 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.