Yoctomole is 1e-24 mole units.
Yoctomoles to Micromoles Converter — ymol to umol
Convert Yoctomole (ymol) to Micromole (umol) using the exact conversion factor (1 yoctomole = 1e-18 micromole). See the formula, worked examples, and conversion table.
Yoctomoles to Micromoles converter
Converter
Chemistry Converter
Convert concentration, molarity, amount, and laboratory scientific units by compatible family.
Context values
Some unit families need one extra value for a physically accurate result.
Micromole is 0.000001 mole units.
Result = input x 1e-24 / 1e-6.
Amount units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Yoctomoles to Micromoles
Yoctomole and Micromole both measure mass concentration — how much of a substance is dissolved or dispersed in a given volume — a core calculation for preparing lab solutions, checking water quality against a regulatory limit, or formulating a pharmaceutical dose. Specifically: Yoctomole is 1e-24 mole units, and micromole is 0.000001 mole units.
Formula
micromoles = yoctomoles × 1e-18
This factor comes from each unit's defined relationship to the category's base unit: 1 yoctomole equals 1e-24 base units, and 1 micromole equals 0.000001 base units, so dividing one by the other gives the direct yoctomole-to-micromole factor of 1e-18.
Simple example
1 ymol × 1e-18 = 1e-18 umol
1 yoctomole = 1e-18 micromoles.
Real-world example
100 ymol × 1e-18 = 1e-16 umol
100 yoctomoles = 1e-16 micromoles.
Conversion table
| Yoctomole (ymol) | Micromole (umol) |
|---|---|
| 0.001 ymol | 1e-21 umol |
| 0.01 ymol | 1e-20 umol |
| 0.1 ymol | 1e-19 umol |
| 1 ymol | 1e-18 umol |
| 10 ymol | 1e-17 umol |
| 100 ymol | 1e-16 umol |
Reverse conversion: Micromole to Yoctomole
1e-18 umol × 1e+18 = 1 ymol
1e-18 micromoles = 1 yoctomoles.
yoctomoles = micromoles × 1e+18
For a page dedicated to this direction, see Micromole to Yoctomole.
Understanding the Yoctomole (ymol)
Yoctomole is 1e-24 mole units.
Understanding the Micromole (umol)
Micromole is 0.000001 mole units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many micromoles are in 1 yoctomole?
1 yoctomole equals 1e-18 micromoles, using the exact defined conversion factor rather than an estimate.
How do I convert yoctomole to micromole?
Multiply the yoctomole value by 1e-18. The converter above does this instantly to whatever precision you set.
How do I convert micromole back to yoctomole?
Use the reverse factor: 1 micromole equals 1e+18 yoctomoles. You can also use the swap control in the converter above to flip the direction instantly.
What is a yoctomole?
Yoctomole (ymol) is a unit of chemistry.
What is a micromole?
Micromole (umol) is a unit of chemistry.
Is the yoctomole to micromole conversion exact?
Yes. Both yoctomole and micromole are defined by fixed standards rather than physical artifacts, so the factor of 1e-18 used above is exact to as many digits as you choose to display.
What's the difference between mass concentration and molarity?
Mass concentration expresses how much mass of a substance is present per unit volume (for example, grams per liter). Molarity expresses the amount in moles per liter instead, which accounts for the substance's molecular weight. This category converts mass-concentration units.