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EST. 2026💼 BUSINESS TOOLS

The Creative Island · Island 06

Ledger Harbor

The business island of the archipelago.

Margins, discounts, VAT, loans — every number a small business owner actually needs, calculated in your browser and never uploaded anywhere.

▶ Open the tools

The map · the grounds

6 places on this island.

Free, fast and private — every tool opens straight from Google search, works on any phone, and never asks you to sign up.

BLDG AThe Counting House · · where profit is counted honestly

BLDG BThe Price Desk · · discounts, markups and the real price

BLDG CThe Tax Window · · VAT, without the headache

BLDG DThe Investment Desk · · what your money actually earned

BLDG EThe Loan Office · · EMI before you sign anything

BLDG FThe Harbor Master · · invoice & quotation office — opening soon

The tool shed · open 24/7

7 tools, pinned to the board.

💰Profit Margin CalculatorFree profit margin calculator — enter revenue and cost to get profit, margin percentage and markup instantly.Open tool ↗🎁Discount CalculatorFree discount calculator — enter price and discount percent to see the final price and exactly how much you save.Open tool ↗📈Markup CalculatorFree markup calculator — enter cost and markup percent to get the selling price, plus the margin it creates.Open tool ↗🧾VAT CalculatorFree VAT calculator — add VAT to a price or remove it, with Bangladesh's 15% as an editable default.Open tool ↗🎯ROI CalculatorFree ROI calculator — enter what you invested and what you got back to see return on investment, profit and annualized return.Open tool ↗⚖️Break-even CalculatorFree break-even calculator — enter fixed costs, price per unit and variable cost to find exactly how many units you must sell to stop losing money.Open tool ↗🏦EMI CalculatorFree EMI calculator — enter loan amount, interest rate and term to see your exact monthly payment and total interest.Open tool ↗

Next on the harbor map: invoice generator, quotation builder and business name generator — the offices are being furnished.

🔒 Privacy, the island rule

Every tool on Ledger Harbor runs entirely in your browser. Nothing you type is uploaded, saved or sent anywhere — no accounts, no tracking. Close the tab and your data is gone, the way it should be. Details: Privacy Policy.

▶ Read everything from Ledger Harbor

Island by Rahul Smoothy · part of The Creative Island

THE ARCHIPELAGO

Speedboat dock. Where to next, captain?

The boat runs from this island straight to every other island of the archipelago.

🏝️Main IslandThe home portSail back ↗🎯The 90s Kids IslandIsland 01 · the memory islandVisit the island ↗🎮Pixel LagoonIsland 02 · the gaming islandVisit the island ↗🛒Bazaar BayIsland 03 · the shopping islandVisit the island ↗🤝Client CoveIsland 04 · for clients & commissionsBring me a brief ↗🎓Scholar BayIsland 05 · student toolsVisit ↗🕑Clocktower TownIsland 07 · daily toolsVisit ↗💻Circuit CoveIsland 08 · developer toolsVisit ↗🎨Palette AtollIsland 09 · design toolsVisit ↗📄Paper PortIsland 10 · text toolsVisit ↗🧑‍💼Career StationIsland 11 · career toolsVisit ↗📷Darkroom IsleIsland 12 · photo toolsVisit ↗🧬Research ReefIsland 13 · science toolsVisit ↗🔒Safe HarborIsland 14 · security toolsVisit ↗

💼Ledger HarborIsland 06 · you are here