The primary toggle separates mass-to-volume from volume-to-mass, so it is immediately clear which value is being solved for.
Convert density, mass, and volume quickly
Keep values when units change
Reuse by formula, URL, TSV, or CSV
Density Calculator: Mass and Volume
Convert mass and volume with density, plus optional coefficient-based temperature correction. Use one page for practical units such as kg/L, g/mL, and lb/gal(US).
The page shows both the formula and the substituted expression, making the calculation easier to review, explain, or teach.
Paste TSV or CSV data to convert multiple rows at once, then copy the result as TSV or download it as CSV.
About temperature correction
The calculator treats the entered density as the density at reference temperature Tref, then applies a simple correction with the volumetric expansion coefficient α. This generally matches how many liquids become less dense as temperature rises.
This correction is only an approximation over relatively small temperature ranges. Strongly nonlinear materials, such as water, or wide ranges can produce noticeable error. For precise work, use manufacturer data or a physical-property handbook.
ρ(T) = ρref / (1 + α × (T − Tref))
How to use
- Choose mass-to-volume or volume-to-mass, then enter the primary value and density.
- Switch units as needed. Changing units does not erase the values you already entered.
- Open temperature correction only when needed, then enter T, Tref, and α.
- Review the result, formula, and substituted expression, then use copy value, copy formula, or share URL.
Notes
- For high-precision trade, regulatory, quality-assurance, or hazardous-materials work, use official physical-property data.
- Temperature correction is coefficient-based and approximate; the error depends on the material and temperature range.
- The tool does not estimate density from a material name alone. Check specifications, SDS sheets, or manufacturer data.
FAQ
Density changes with temperature. How is that handled?
This tool uses a coefficient-based approximation rather than a detailed physical-property model. Refer to manufacturer data or handbooks when higher accuracy matters.
Which units are available?
Density supports kg/L, g/mL, kg/m3, g/cm3, lb/gal(US), and lb/ft3. For mass, choose kg, g, or lb. For volume, choose L, mL, m3, or gal(US).
Can I calculate many rows at once?
Yes. In the batch tab, paste TSV or CSV data for bulk conversion. You can export the result by copying TSV or downloading CSV.
What if I do not know the density?
The tool does not guess density from a material name. Because the error risk can be high, use specifications, SDS sheets, or published manufacturer values.