How to use the lab buffer preparation calculator
Find grams of solute needed for a buffer. Enter concentration, volume, molar mass in the fields above; the mass to weigh is computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- C — Concentration (mM)
- V — Volume (mL)
- M — Molar mass (g/mol)
Worked example
With concentration = 50 mM, volume = 500 mL, molar mass = 121.14 g/mol, the calculator gives mass to weigh ≈ 3.0285 g.
Frequently asked questions
What is the formula for the lab buffer preparation calculation?
Mass to weigh (g) = C / 1000 × V / 1000 × M. Here C is concentration (mM), V is volume (mL), M is molar mass (g/mol).
What inputs do I need for the lab buffer preparation calculator?
You need concentration in mM, volume in mL, molar mass in g/mol. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.