Nexus Calculator

Nexus Calculator is a fast, beautiful, all-in-one calculator that goes far beyond basic arithmetic. From scientific and programmer math to currency, units, loans, tax, and fertility planning, it puts every calculator you need into one elegant, privacy-first app. Built for students, professionals, and everyday users who want a single tool for every kind of calculation.

CALCULATOR — three modes in one
• Standard: arithmetic with full memory functions (MC, MR, MS, M+, M-)
• Scientific: trigonometry, logarithms, exponentials, powers, roots, factorial, π and e, DEG/RAD toggle
• Programmer: live HEX, DEC, OCT, and BIN display with bitwise operations (AND, OR, XOR, NOT, shifts)

CURRENCY CONVERTER
• 75+ currencies including USD, EUR, GBP, JPY, INR, NGN, BRL, ZAR, and AED
• Cryptocurrencies (BTC, ETH) and precious metals (Gold, Silver)
• Live exchange rates with an optional offline mode
• Save your most-used pairs as one-tap presets

UNIT CONVERTER
• 15 categories and 150+ units
• Length, weight, temperature, volume, area, speed, time, energy, pressure, data, angle, frequency, power, fuel economy, and cooking
• Instantly see your value converted to every other unit at once
• Save custom presets for quick recall

LOAN CALCULATOR
• Calculate repayment amount, total interest, total cost, payoff date, and effective annual rate
• Five loan types: amortized (reducing balance), flat interest, interest-only, balloon, and simple interest
• Flexible payment frequencies from daily to annually, in any currency
• Add down payment, processing fees, insurance, extra payments, balloon amounts, and grace periods
• Visual principal-vs-interest and balance-over-time charts, a full amortization schedule, and CSV export
• Ideal for personal loans, mortgages, and asset finance

TAX CALCULATOR
• Estimate personal income tax, salary tax, business tax, and take-home (net) pay
• Use country presets or build your own fully editable tax brackets
• Account for pension, insurance, reliefs, allowances, deductions, and tax credits
• Factor in PAYE and withholding tax already paid, plus optional VAT
• Choose your income period and tax year, then copy the summary or export to CSV

OVULATION & FERTILITY CALCULATOR
• Estimate your ovulation date, fertile window, and next period
• Visual monthly calendar highlighting your period, fertile, and ovulation days
• Personalize with your average cycle length, period length, and luteal phase
• For planning and informational purposes only — not medical advice or a method of contraception

AI MATH ASSISTANT
Ask questions in plain English:
• "What is 15% of 200"
• "Convert 100 USD to EUR"
• "How many km in 10 miles"
• "Area of circle radius 7"
• "Tip for 85 at 18%"
• "Explain the quadratic formula"

VOICE COMMANDS
Speak your calculations naturally in 10 languages: English (US and UK), Spanish, French, German, Italian, Portuguese, Japanese, Korean, and Chinese.

10 BEAUTIFUL THEMES + CUSTOM
Choose from Dark, Midnight, Cyberpunk, Forest, Ocean, Sunset, Monochrome, Rose, Light, and Cream — or design your own with the built-in color picker.

PRIVACY-FIRST
• No data collected, no ads, no tracking, and no account required
• Your calculations, presets, and history stay on your device

Nexus Calculator — every calculator you'll ever need, in one place.