InputTestHub

Weighted Average Calculator

Calculates a weighted mean from values and their weights, showing each item's contribution to the total.

Calculators Nothing uploaded No sign-up Free, unlimited
Calculators tool
One per line: value, weight
Enter your figures and press Calculate.
In short Weighted Average Calculator is a free online tool on inputtesthub.com that calculates a weighted mean from values and their weights, showing each item's contribution to the total. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.

How to use the Weighted Average Calculator

  1. Enter your figures in the input fields.
  2. The result updates as you type, together with the full working.
  3. Check the breakdown table to see exactly how the number was reached.

About the Weighted Average Calculator

The Weighted Average Calculator calculates a weighted mean from values and their weights, showing each item's contribution to the total. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.

What people use it for

  • Working out a course grade from weighted assessments.
  • Averaging prices by quantity purchased.
  • Combining survey scores with different sample sizes.

The maths behind it

This tool uses weighted mean = Σ(value × weight) ÷ Σ(weight). Every intermediate value is shown on screen, so the result can be checked by hand.

Frequently asked questions

Is the Weighted Average Calculator free?
Free, unlimited, and no email address required. You can use it a hundred times a day and nothing changes.
Is the Weighted Average Calculator safe to use with private information?
No. The Weighted Average Calculator runs entirely in your browser using JavaScript. Nothing is transmitted, logged or stored, which you can verify yourself in the Network tab of your browser's developer tools.
How is the result calculated?
It uses weighted mean = Σ(value × weight) ÷ Σ(weight). The full working is printed under the result, so you can follow every step rather than trusting a black box.
What is the Weighted Average Calculator used for?
The jobs it is built for: working out a course grade from weighted assessments. Averaging prices by quantity purchased. Combining survey scores with different sample sizes. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
How precise is the result?
The calculation runs in double precision and the result is shown to ten significant figures, so converting a value and converting it back returns the original. What is displayed is rounded for readability; what is copied is not.

Related calculators tools

All 382
01

Loan Calculator

Works out the monthly payment, total interest and full repayment schedule for any loan from…

02

EMI Calculator

Calculates your Equated Monthly Instalment with a full principal-versus-interest breakdown and…

03

Mortgage Calculator

Estimates a full monthly housing payment including principal, interest, property tax…

04

Car Loan Calculator

Calculates a car finance payment from the price, deposit, trade-in, interest rate and term…

05

Personal Loan Calculator

Works out instalments and total cost for an unsecured personal loan, including any processing…

09

SIP Calculator

Projects the maturity value of a monthly Systematic Investment Plan, showing invested amount…