Conversion method
Magnetic flux through a surface, not flux per area. Weber equals volt second; maxwell is a CGS unit.
Mx = x × 100000000
10 Wb = 1000000000 Mx.
| Wb | Mx |
|---|---|
| 1 | 100000000 |
| 5 | 500000000 |
| 10 | 1000000000 |
| 25 | 2500000000 |
| 50 | 5000000000 |
| 100 | 10000000000 |
Unit definitions and sources
Magnetic flux through a surface, not flux per area. Weber equals volt second; maxwell is a CGS unit.
| Unit and system | Use | Definition | Relationship |
|---|---|---|---|
| Weber (Wb); si | Common units | Weber: base (wb) = value × 1. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Maxwell (Mx); si | Common units | Maxwell: base (wb) = value × 1e-08. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Milliweber (mWb); si | Specialist units | Milliweber: base (wb) = value × 0.001. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Microweber (µWb); si | Specialist units | Microweber: base (wb) = value × 1e-06. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Exaweber (EWb); si | Specialist units | exaweber: E denotes 10^18; the unit gives 1000000000000000000 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Petaweber (PWb); si | Specialist units | petaweber: P denotes 10^15; the unit gives 1000000000000000 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Teraweber (TWb); si | Specialist units | teraweber: T denotes 10^12; the unit gives 1000000000000 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Gigaweber (GWb); si | Specialist units | gigaweber: G denotes 10^9; the unit gives 1000000000 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Megaweber (MWb); si | Specialist units | megaweber: M denotes 10^6; the unit gives 1000000 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Kiloweber (kWb); si | Specialist units | kiloweber: k denotes 10^3; the unit gives 1000 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Hectoweber (hWb); si | Specialist units | hectoweber: h denotes 10^2; the unit gives 100 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Decaweber (daWb); si | Specialist units | decaweber: da denotes 10^1; the unit gives 10 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Deciweber (dWb); si | Specialist units | deciweber: d denotes 10^-1; the unit gives 0.1 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Centiweber (cWb); si | Specialist units | centiweber: c denotes 10^-2; the unit gives 0.01 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Nanoweber (nWb); si | Specialist units | nanoweber: n denotes 10^-9; the unit gives 1e-9 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Picoweber (pWb); si | Specialist units | picoweber: p denotes 10^-12; the unit gives 1e-12 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Femtoweber (fWb); si | Specialist units | femtoweber: f denotes 10^-15; the unit gives 1e-15 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Attoweber (aWb); si | Specialist units | attoweber: a denotes 10^-18; the unit gives 1e-18 wb. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Volt second (V·s); other | Specialist units | volt second = 1.0 wb, derived from the component SI/customary definitions. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Tesla square meter (T·m²); other | Specialist units | tesla square meter = 1.0 wb, derived from the component SI/customary definitions. Common use: Magnetic Flux. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Tesla square centimeter (T·cm²); other | Specialist units | tesla square centimeter = 0.0001 wb, derived from the component SI/customary definitions. Common use: Magnetic Flux. 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 magnetic flux conversions
All 21 magnetic flux units convert through Weber (Wb). 21 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.