Milli to Deci Converter
Enter the prefix value in milli below to convert it to deci.
Convert Milli (10⁻³) to Deci (10⁻¹)
Enter a value in milli (10⁻³) (m) to convert to deci (10⁻¹) (d).
Milli to Deci Conversion Table
Table showing various milli measurements converted to deci. Click any preset value or arrow to load it into the converter.
How to Convert Milli to Deci
To convert milli to deci, multiply the prefix value by the following conversion ratio: 0.01 deci/milli.
Since one milli is equal to 0.01 deci, you can use this simple formula to convert:
The prefix value in deci is equal to the prefix value in milli multiplied by 0.01.
For example, here's how to convert 5 milli to deci using the formula above.
How Many Deci Are in a Milli?
There are 0.01 deci in a milli, which is why we use this value in the formula above.
Our milli to deci calculator automatically converts your prefix value measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Milli and deci are both units used to measure prefix value. Keep reading to learn more about each unit.
What Is a Milli?
A milli is a unit of prefix value equal to 1/1,000 of a base unit (0.001 1). SI prefix for 10⁻³ (thousandth). [1]
The milli is classified as an International System of Units (SI) unit of prefix value. Milli can be abbreviated as m; for example, 1 milli can be written as 1 m.
When working with milli (m) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, milli (m) are widely used across fine-tolerance laboratory, analytical, and micro-scale prefix value measurements within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Deci?
A deci is a unit of prefix value equal to 1/10 of a base unit (0.1 1). SI prefix for 10⁻¹ (tenth). [2]
The deci is classified as an International System of Units (SI) unit of prefix value. Deci can be abbreviated as d; for example, 1 deci can be written as 1 d.
When working with deci (d) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, deci (d) are widely used across standard prefix value applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
When converting prefix value between milli (m) and deci (d), keep full floating-point precision (1 m = 0.01 d; 1 d = 100 m) during intermediate calculations and round only the final deci figure to match your instrument tolerance.
More Milli & Deci Conversions
Need to calculate in the opposite direction? Use our deci (10⁻¹) to milli (10⁻³) calculator to switch your starting unit immediately. You can also explore related tools such as converting deci (10⁻¹) to milli (10⁻³), converting base units (10⁰) to tera (10¹²), or converting tera (10¹²) to base units (10⁰).
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Prefixes Metrology Standard — Milli (10⁻³) (m) to Deci (10⁻¹) (d)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Milli (m) (m) & Deci (d) (d)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (m to d)