How do I calculate how many shares I can buy with my buying power?

Enter your available buying power ($) and target share price ($). The calculator instantly shows your maximum 100% share count plus 10%, 20%, 25%, 33%, and 50% portfolio sizing allocations.

Can I calculate fractional shares for US stocks and crypto?

Yes! Open Pro Options and switch Share Precision to Fractional (4 Decimals) to calculate exact fractional share or crypto quantities.

Stock Position Size & Buy Quantity Calculator | Portfolio Weight & Price Bands

Available Buying Power & Entry Price

Available Buying Power ($)

$10.00 K

Entry Share / Coin Price ($)

$150

Trading Fee / Commission (%)

Prevents margin/overdraft orders

Share / Unit Precision

Max Buyable Shares (100% Buying Power) 0 sh

Total Capital Deployed (Incl. Fees) $0

Remaining Uninvested Cash $0

Portfolio %	Allocated Cash	Buyable Shares	Actual Cost

Risk-Based Position Sizer & R:R Ratio Calculator

Total Account Balance ($)

$25.00 K

Max Account Risk per Trade (%)

Max Loss: $250.00

Entry ($)

Stop-Loss ($)

Target ($)

Optimal Shares to Buy (Exact Risk Cap) 50 sh ($5,000)

Risk : Reward Ratio & Target Profit 1 : 3.00 (+$750.00)

Max Dollar Loss if Stopped Out -$250.00 (-5.0% Stop)

Move % from Entry	Upside Target (+)	Downside Level (-)

Daily Breakout Gain (%)

Shares Held

Rally Step	Projected Price	Total Gain %	Portfolio Value

🧮 Stock Position Size, Buy Quantity & Price Band Calculator Guide

Instantly calculate the maximum number of shares you can purchase without margin overdraft, along with 10%, 20%, 25%, 33%, and 50% position sizing splits for disciplined risk management. Switch to the Price Bands tab to view upside breakout targets and downside stop-loss levels.

📚 [Cheat Sheet] Position Sizing Rules & Multi-Step Breakout MultipliersExpand ▾

📋 1. Standard Institutional & Swing Trader Position Sizing Rules

Allocation %	10% (Starter)	20% (5-Stock)	25% (4-Tranche)	33% (3-Tranche)	50% (Core)
Best Used For	High-beta / Speculative	Balanced Swing Portfolio	4-Step DCA Entry	Classic 3-Step Scale-In	High-Conviction Core