How to use the Stock Average Price Calculator

A short, clear, step-by-step guide to calculate your new average price per share.

Quick overview

The calculator combines your existing holding and a new buy to show the adjusted average cost per share. It helps you understand how a new purchase affects your overall position.

Fields to fill

  • No. of Share(s) — enter how many shares you bought in the first purchase (Initial Purchase).
  • Average Price Per Share — enter the average price you paid for that initial purchase.
  • No. of Share(s) (New Purchase) — enter how many shares you will add now.
  • Average Price Per Share (New Purchase) — enter the price you will pay for the new shares.

Step-by-step

  1. Open the Stock Average Price Calculator page and locate the Initial Purchase and New Purchase panels.
  2. In Initial Purchase, put the number of shares and the average price per share you already hold.
  3. In New Purchase, put the number of shares you plan to buy and the price per share you will pay now.
  4. Click the Calculate Average Price button.
  5. Read the results: Total Share(s), Average Price, and Total Investments. These values show your updated holding after the new purchase.

Example

Example: you hold 100 shares at ₹200. You buy 50 more at ₹150.

  • Total Share(s): 150
  • Total Investments: ₹ (100×200 + 50×150) = ₹25,000
  • Average Price: ₹25,000 / 150 = ₹166.67

Tips

  • Use realistic prices including brokerage if you want a more accurate investment total.
  • If total shares become zero (no holdings), the Average Price will be shown as ₹0.00.
  • This calculator is for averaging cost only — it does not show profit/loss or tax calculations.

Published: 19 August 2025 • Author: HeroZero