🧮 Unit Price Calculator

Calculate prices per unit, convert measurements, compare costs, and find out how much you can buy. Perfect for shopping, cooking, fuel costs, and business calculations.

📏 Unit Category

🧮 Calculation Mode

🛒 How Much Can I Buy?

Item Price

Per Unit

How much do you want to spend?

₹

Quick Examples:

🛒 Purchase Calculation

0.200 L

You can buy this much!

₹1000 × 0.20 L = ₹200

₹200

Amount to Spend

₹1000/L

Price per Unit

✨ Features

✓Multiple unit categories (weight, volume, length, area, energy)
✓20+ currencies with flags and symbols
✓Real-time calculations and conversions
✓Price comparison with best value highlighting
✓Quick presets for common items
✓Copy results to clipboard

📖 Usage Examples

🛒 Shopping Calculator:

"Petrol costs ₹1000/L, I want to spend ₹200 - how much fuel can I buy?"

🍳 Cooking Conversions:

Convert 500g flour to cups, or 2L milk to quarts

⚡ Utility Bills:

Calculate electricity cost: ₹8/kWh, used 150 units

🏪 Price Comparison:

Compare prices between stores: same product, different costs

📐 Unit Conversion:

Convert measurements: 5kg to pounds, 1000mL to gallons

Overview

Unit Price Calculator — Compare Costs & Convert Measurements

The Unit Price Calculator on sourcecodestack handles four related problems in one place: figuring out how much of something you can buy for a given budget, calculating the normalised price per base unit, converting between measurement units, and comparing the true per-unit cost of different products. All calculations run locally in your browser — nothing is sent to a server.

The tool covers five unit categories — weight, volume, length, area, and energy — and supports over 20 currencies with their symbols and flags. Quick Presets pre-fill real-world examples like petrol price per litre, milk, rice, electricity per kWh, and fabric per metre, so you can verify the tool against familiar numbers before entering your own.

100% freeNo sign-upRuns in your browser20+ currencies

How to use it

1Choose a unit category: Weight, Volume, Length, Area, or Energy.
2Select a calculation mode: How much can I buy, Price per unit, Unit conversion, or Compare prices.
3Enter the item price, select the currency and unit, then enter your budget amount.
4Read the result in the right-hand panel — it updates immediately as you type.
5Use Compare prices mode to add two or more items and see which offers the lowest cost per base unit.

Key features

Four modes: quantity for budget, price per base unit, unit conversion, and side-by-side price comparison
Five unit categories with all common sub-units: weight, volume, length, area, and energy
22 currencies including USD, EUR, GBP, INR, JPY, AUD, CAD, and more
Best Value badge highlights the cheapest option when comparing multiple products
Quick Presets for petrol, milk, rice, bread, electricity, and fabric calculations
Unit conversion mode converts any value between units within the selected category
All calculations are performed client-side — no data leaves your browser

Frequently asked questions

What does the "How much can I buy" mode calculate?

It divides your target spend by the item price to tell you exactly how many units you get. For example, if petrol costs 100 per litre and your budget is 500, the result is 5 litres.

How does the price comparison work?

Each item's price is divided by its quantity converted to the category base unit, producing a normalised cost per base unit. The item with the lowest cost per base unit is labelled Best Value.

Does the currency conversion use live exchange rates?

No. The currency selector only labels the unit of your input price — it does not convert between currencies. Both prices in a comparison should be entered in the same currency for a valid result.

Can I compare more than two items?

Yes. In Compare prices mode, click Add Item to add as many products as you like. The Best Value label moves automatically to whichever item has the lowest normalised price.