Free Lab Calculators: Percent Solutions, Dilution, Serial Dilution, PCR Mix, Molarity, Cell Seeding, Centrifuge
Lab calculators that work the moment you open them, no account or login needed. From percent solutions, antibody dilution, serial dilutions and PCR mixes to molarity, cell seeding and centrifuge rpm to ×g, each one shows the formula, converts units for you and includes bench tips so you can follow the result directly.
Lay out 6 to 384-well plates: drag to select wells, assign samples and conditions, fill a dilution series in one click, then copy the result as a table. Save it to Vara and link it to an experiment step.
Calculators
- Antibody Dilution Calculator (1:N)
How to make 1:500 or 1:1000: stock volume in μL and diluent to top up.
Stock (μL) = Total (mL) × 1000 ÷ N
- Solution Preparation Calculator (% w/v)
Grams to weigh and volume to top up for 5% BSA, 0.9% NaCl and other % w/v solutions.
Solute (g) = Conc. (%) × Volume (mL) ÷ 100
- PCR / qPCR Reaction Mix Calculator (Master Mix)
Total mix and master mix volume for N reactions, with 10% pipetting overage built in.
Total (μL) = Rxn vol × N × 1.1
- Molarity Calculator (Mass, Molecular Weight, Volume, Concentration)
Solve for mass, MW, volume or concentration, like grams for 500 mL of 0.5 M.
Mass (g) = Conc. (mol/L) × Volume (L) × MW (g/mol)
- Cell Seeding Calculator (Cells per Well and Seeding Density)
Seed by cells per well or cells/cm²: how much suspension and medium to add.
Cells per well = Density (cells/cm²) × Well area (cm²)
- RCF to RPM Calculator (Centrifuge g-Force Conversion)
Rotor radius and rpm to ×g, or ×g back to rpm.
RCF (×g) = 1.118 × 10⁻⁵ × r (cm) × rpm²
- Serial Dilution Calculator (Volumes and Concentration per Tube)
10-fold or 2-fold series: how much to transfer and add, with the concentration of each tube.
Transfer (mL) = Final volume per tube ÷ Dilution factor
- Percent Solution Calculator (% w/v, % v/v, % w/w)
Grams or mL for % w/v, v/v and w/w, including 70% ethanol from 95%.
% w/v: Solute (g) = Percent × Total volume (mL) ÷ 100
You got this step right, but a whole experiment has dozens of linked parameters. Change one dilution factor and everything downstream has to be recalculated. In Vara the parameters of your whole experiment are connected, so changing one recalculates the rest automatically. Manage 3 experiments for free.