How to use the combined mean of two groups calculator
Find the overall mean of two groups from their sizes and means. Enter group 1 size, group 1 mean, group 2 size, group 2 mean in the fields above; the combined mean is computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “combined mean”, “weighted mean of two groups”, “overall average of two samples”, “calculate combined mean of two groups”, “find combined mean”.
Formula
Variables
- n1 — Group 1 size
- m1 — Group 1 mean
- n2 — Group 2 size
- m2 — Group 2 mean
Worked example
With group 1 size = 30, group 1 mean = 72, group 2 size = 20, group 2 mean = 85, the calculator gives combined mean ≈ 77.2.
Frequently asked questions
What is the combined mean of two groups calculator used for?
Find the overall mean of two groups from their sizes and means. It helps with questions such as “combined mean”, “weighted mean of two groups”, “overall average of two samples”.
What is the formula for the combined mean of two groups calculation?
Combined mean = (n1 × m1+n2 × m2) / (n1+n2). Here n1 is group 1 size, m1 is group 1 mean, n2 is group 2 size, m2 is group 2 mean.
What inputs do I need for the combined mean of two groups calculator?
You need group 1 size, group 1 mean, group 2 size, group 2 mean. 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 the combined mean of two groups 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 combined mean of two groups 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.