Calculator

A Mathematical Notebook

Write one expression per line. Results appear after each expression. Use the help button for examples. Your notebook is saved on this device. Use the footer menu to clear or restore it.

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Calculator

A Mathematical Notebook

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A few things to know.

One calculation per line. Give amounts a name to reuse them below.

Personal expenses

# Monthly expenses
rent = 65000 TL
electricity = 1650 TL
bills = 3500 TL
total = rent + electricity + bills
total to usd

Total: 70,150.00 TL. Change an amount to update the total.

Math & percentages

Use a dot for decimals and explicit operators: 2 * (3 + 4), 2^3, sqrt(81). No thousands separators in input. Start a note with #.

200 + 10% → 220; 200 * 10% → 20. A percentage directly after + or − is relative to the left amount; p = 10% stores 0.1.

Names are case-sensitive and read from top to bottom. A failed assignment makes its name unavailable until corrected.

Functions: sqrt, abs, round, floor, ceil, min, max, pow, sin, cos, tan, ln, log10. Angles use radians; pi and e are available.

34-digit calculations; results show up to 12 digits or 2 decimal places for money. ≈ means rounded. Hover for the unformatted value. The keypad uses conventional immediate execution: 2 + 3 × 4 = 20.

Currencies & rates
1 usd to tl
1 $ to TL

Codes ignore case. TL, TRY and ₺ mean Turkish lira; $ means USD, € EUR, £ GBP, ¥ JPY. Symbols work before or after amounts. Convert currencies before adding them.

Frankfurter provides indicative reference rates, not bank prices. Dates vary by currency and appear beside conversions. Over 72 hours is marked older; after seven days the affected conversion stops. Refresh once per minute. New offline sessions have no rates.

All supported codes & symbols

AED, AFN, ALL, AMD, ANG, AOA, ARS, AUD, AWG, AZN, BAM, BBD, BDT, BGN, BHD, BIF, BMD, BND, BOB, BOV, BRL, BSD, BTN, BWP, BYN, BZD, CAD, CDF, CHE, CHF, CHW, CLF, CLP, CNH, CNY, COP, COU, CRC, CUP, CVE, CZK, DJF, DKK, DOP, DZD, EGP, ERN, ETB, EUR, FJD, FKP, GBP, GEL, GHS, GIP, GMD, GNF, GTQ, GYD, HKD, HNL, HTG, HUF, IDR, ILS, INR, IQD, IRR, ISK, JMD, JOD, JPY, KES, KGS, KHR, KMF, KPW, KRW, KWD, KYD, KZT, LAK, LBP, LKR, LRD, LSL, LYD, MAD, MDL, MGA, MKD, MMK, MNT, MOP, MRU, MUR, MVR, MWK, MXN, MXV, MYR, MZN, NAD, NGN, NIO, NOK, NPR, NZD, OMR, PAB, PEN, PGK, PHP, PKR, PLN, PYG, QAR, RON, RSD, RUB, RWF, SAR, SBD, SCR, SDG, SEK, SGD, SHP, SLE, SLL, SOS, SRD, SSP, STN, SVC, SYP, SZL, THB, TJS, TMT, TND, TOP, TRY, TTD, TWD, TZS, UAH, UGX, USD, USN, UYI, UYU, UYW, UZS, VED, VES, VND, VUV, WST, XAF, XCD, XCG, XDR, XOF, XPF, YER, ZAR, ZMW, ZWG, ZWL

Also: ₹ INR, ₽ RUB, ₩ KRW, ₪ ILS, ฿ THB, ₫ VND, ₱ PHP, ₴ UAH, ₦ NGN, ₸ KZT. RMB means CNY. Recognized currencies can be used without rates; conversion needs fresh source data. No crypto or precious metals.

Privacy & offline use

Your notebook and last keypad calculation are saved only in this browser on this device and restored when you return. Clear it from the footer menu; the last cleared notebook can be restored there, even after reopening. Restoring preserves any replacement text as the next recovery copy. AC resets the keypad and its saved calculation; it does not clear your notebook. Open tabs share this notebook. Nothing you type is sent to a server; only public exchange rates are fetched. Browser data deletion can remove your notebook and recovery copy. If saving is unavailable, a warning appears; keep a copy before leaving.

When “Offline ready” appears, use your browser’s install option or Add to Home Screen. Ordinary math works offline. Close all Calculator tabs to apply a waiting update.

Saved on this device. Never sent to a server.