Calculators
Weighted Average Calculator
True average cost across several share purchases.
Add a row per purchase. Weighted average is total cost ÷ total
units, which is the figure a broker shows as your average buy price.
Quantity × price per row
Result
Weighted average price
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Enter at least one row
- Total units
- 0
- Total cost
- Rs 0
- Simple average (for comparison)
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Why it differs from a simple average
Buying 100 shares at Rs 500 and 10 shares at Rs 900 gives a simple average of Rs 700 — which is not what you paid overall. The weighted average is (100×500 + 10×900) ÷ 110 = Rs 536.36, because the cheaper purchase carried most of the money. For a share portfolio, unit trust or inventory valuation, the weighted figure is the meaningful one.
Use it to check a broker’s average buy price, to work out break-even before you sell, or to combine lots bought at different prices into one cost basis.