UD5 Toolkit
Bi‑Weekly Mortgage Payment Calculator – Save Thousands
Calculate the interest savings and earlier payoff date by switching to bi‑weekly mortgage payments instead of monthly. See the power of an extra annual payment.
Financial Calculators - Money Management
36+ toolsCurrency Code to Symbol Converter - Online ISO 4217 Lookup
Enter a three‑letter currency code like USD or EUR and instantly see the corresponding symbol and number of decimals. Quick developer reference.
Receipt & Expense Logger - Online Simple Finance
Snap or type expense details and store them locally. Categorize and see monthly totals. No cloud, no sign‑up.
Investment Goal Timeline - Online Reach Your Target
Enter your current savings, monthly contribution, and target amount. Calculate time needed and suggestions. Private.
Mortgage Overpayment & Amortization Calculator - Online
See how extra monthly or lump‑sum payments reduce your mortgage term and total interest. Dynamic chart. All local calculation.
NPV Calculator - Online Net Present Value & IRR
Enter cash flows and discount rate to compute Net Present Value and Internal Rate of Return. Finance 101.
Number to English Words - Online Write Out Checks
Enter any number up to trillion and get the English word representation. For filling out checks or legal documents.
ISO Currency Code Lookup - Online Search by Country
Find the three‑letter currency code (USD, EUR, JPY) for any country. Also lists currency symbol and name. Static.
Currency Name ↔ Code Converter - Online USD/EUR Lookup
Find the currency code (USD, EUR, JPY) for any country or reverse‑lookup the country from a code. Static reference.
Itemized Receipt Splitter - Online Who Ordered What?
Assign each receipt item to specific people, then split tax and tip proportionally. Fair group dining payments. All local.
Simplified DCF Valuation - Online Stock Intrinsic Value
Estimate the intrinsic value of a stock using a simplified Discounted Cash Flow model with growth rate and discount rate.
Simple Budget Worksheet - Online Monthly Income Expense
Fill out a clean budget worksheet with income and expense categories. See totals and print. No data stored.
Rule of 72 Calculator - Online Estimate Investment Doubling
See how many years it takes to double your money at a given interest rate using the Rule of 72. Quick financial math.
Crypto Address Format Checker - Online Validate Wallet
Paste a Bitcoin, Ethereum, or other crypto wallet address and quickly verify its format and checksum. No connection to blockchain.
Currency Symbol Lookup - Online Find $ € ¥
Search by country or currency name to find its symbol and code. Quick static reference for international business.
Stock Average Down Calculator - Online Investment Cost Basis
Calculate the new average cost of a stock after buying more shares at a different price. Invest smarter. All local.
Car Loan Calculator - Online Auto Financing & EMI Tool
Estimate monthly car loan payments with trade-in, down payment, and sales tax options. Amortization schedule included. Client-side calculation.
Static Currency Converter - Online Fixed Rates Table
Convert currencies using a built‑in table of approximate fixed rates. Useful for quick estimates without live data. Local.
IBAN Structure Checker - Online Validate Format & Country
Check if an IBAN has the correct length and structure for its country. Early validation, no bank connection.
Envelope Budget Planner - Online Cash Category Allocator
Allocate your monthly income into virtual envelopes by category. Track spending and see remaining balances. LocalStorage.
Currency Converter - Online Exchange Rate (Manual Update)
Convert between currencies using manually updated or default rates. Great for estimation when offline. Local settings.
Retirement Calculator - Online Savings & Investment Planner
Project your retirement savings growth with monthly contributions, employer match, and CAGR. Interactive chart. Financial data stays on your device.
Hourly Pay Calculator - Online Wage & Overtime Estimator
Calculate your weekly, monthly, or annual pay based on hourly wage and hours. Include overtime rates. Accurate and private.
Event Budget Planner - Online Party Expense Estimator
Plan a party or event budget by category (venue, food, decorations). See total and cost per guest. Export summary.
Net Worth Tracker - Online Assets & Liabilities Overview
Log your assets and liabilities to calculate your net worth over time. Data saved only in your browser for security. Simple and clutter-free.
Subscription Rename & Cost Calculator - Online Saver
Track your subscriptions, calculate monthly and yearly totals, and find savings by pausing unused services. Local data.
Crypto Price Ticker - Online Live Bitcoin & Ethereum
Live cryptocurrency prices from public APIs. Clean ticker with percentage changes. Pure frontend, no account needed.
Credit Card Payoff Calculator - Online Debt Repayment Plan
Calculate how long it will take to pay off credit card debt with fixed monthly payments or a payoff goal. Understand interest costs fully.
Sales Tax Calculator - Online U.S. State Tax Estimator
Estimate the total price after adding US state sales tax. Select state, enter amount, and see breakdown. Simple and quick, perfect for shoppers.
Mortgage Calculator - Online Home Loan & Amortization Tool
Estimate monthly mortgage payments with amortization schedule. Input loan amount, interest rate, and term. All calculations performed securely on your device.
Compound Interval Calculator - Online Daily/Weekly Growth
Compute compound interest with various compounding frequencies (daily, weekly, monthly). Compare APY with simple interest. Local and secure.
Simple Ledger Book - Online Debit / Credit Tracker
A basic double‑entry bookkeeping table. Add transactions with description, debit, and credit. Balances automatically.
Loan Calculator - Online EMI & Amortization Schedule Generator
Calculate monthly EMIs for any loan type and see the detailed amortization schedule. Compare different interest rates and tenures with instant results.
Compound Interest Calculator - Online Investment Growth Tool
Project how your savings and investments grow over time with compound interest. Interactive chart and detailed table. Free and anonymous.
CAGR Calculator - Online Compound Annual Growth Rate
Find the CAGR of an investment given start and end values over a time period. Instant growth rate.
Expense Tracker - Online Simple Budget & Spend Logger
Track personal expenses and categorize spending. Interactive charts show where your money goes. All financial data remains in your browser only.