Finance Toolkit.
Five finance tools in one place.

Split bills fairly, calculate compound interest, compare ethanol vs gasoline, and generate PDF receipts. 100% private, no uploads.

receipt_long Bill Split

Split bills fairly — drinkers pay for alcohol, everyone shares food and service equally.
💰 Bill details
Only drinks with alcohol — beers, cocktails, wine, etc.
2
2
📊 Results
Food total
R$ 230.00
Tip amount
R$ 52.50
Grand total
R$ 402.50
Each non-drinker
R$ 0.00
Each drinker
R$ 0.00

calculate Compound Interest

Calculate investment growth with monthly contributions and custom compounding.
📊 Results
Future Value
R$ 0.00
Total including interest
Total Invested
R$ 0.00
Principal + contributions
Total Interest
R$ 0.00
Profit from compounding
Interest % of Total
0%
Return on investment
Effective Annual Rate
0%
Years to Double
0
Monthly Return
R$ 0
Investment Growth Over Time

local_gas_station Fuel Calculator

Compare ethanol vs gasoline prices using the 70% efficiency rule. Know which fuel saves you money.
grass ETHANOL
per liter
local_gas_station GASOLINE
per liter
Current price ratio (Ethanol ÷ Gasoline)
69.0%
Ethanol is below 70% — WORTH IT!
grass
Ethanol
Better value for your money — you save more per kilometer
Ethanol needs about 30% more volume to cover the same distance as gasoline.
How it works: Ethanol has about 30% lower energy efficiency than gasoline. It's worth choosing ethanol when its price is ≤ 70% of gasoline price.

description Receipt Generator

Create simple, professional PDF receipts for your freelance clients.
📝 Receipt information
👁️ Live preview
PAYMENT RECEIPT
Receipt #001
Date—
ClientJohn Smith
ServiceWeb design services - Landing page development
Payment methodBank Transfer
Amount receivedR$ 850.00
Received by: CLICK FREE TOOLS
Electronic receipt — valid without signature

Four Finance Tools, One Place

This toolkit brings together four essential finance utilities: split bills fairly, calculate compound interest, compare fuel prices, and generate PDF receipts.

Everything runs locally in your browser. Your data never touches a server — it stays on your device from start to finish.

Bill Split — How it works

This tool separates alcoholic drinks from the rest of the bill. Non-drinkers pay only for food and their share of the service. Drinkers pay for their own drinks plus their share of food and tip.

The math is simple: food cost is split equally among everyone, tip is split equally among everyone, and alcoholic drinks are split only among drinkers.

Best for: Group dinners, parties, any situation where some people drink and others don't.
Compound Interest — How it works

Enter your starting amount, monthly contributions, expected return, and investment time. The calculator shows future value, total invested, and interest earned. A visual chart shows growth over time.

Supports 30+ currencies and multiple compounding frequencies (daily, weekly, monthly, quarterly, annually).

Best for: Investors, retirement planning, anyone who wants to see the power of compound interest.
Fuel Calculator — How it works

This tool compares ethanol and gasoline prices using the 70% efficiency rule. Ethanol has about 30% lower energy content, so it's worth it when its price is ≤ 70% of gasoline price.

You can swap prices, choose from 7 currencies, and get a clear recommendation with savings information.

Best for: Flex-fuel vehicle owners, anyone who wants to save money at the pump.
Receipt Generator — How it works

Fill in the receipt details — number, date, client, service, amount, payment method, and notes. The preview updates in real-time. Click "Download PDF Receipt" to save a clean, professional PDF.

Supports multiple currencies and languages. All data stays in your browser.

Best for: Freelancers, contractors, small businesses who need simple receipts for clients.

Why This Toolkit Is Better

Frequently Asked Questions

Are my calculations private?

Yes. All calculations happen in your browser. Nothing is sent to any server. Your data never leaves your device.

What browsers are supported?

The toolkit works on modern browsers — Chrome, Firefox, Edge, and Safari. It requires JavaScript to be enabled.

Can I use this offline?

Yes. Once the page loads, all the code is cached in your browser. You can disconnect from the internet and continue working.

What currencies are supported?

30+ currencies including USD, EUR, GBP, BRL, CAD, AUD, JPY, CNY, INR, MXN, and more.