Online calculators

Online calculator catalog
Life 126
	Calendar ISO calendar, Days between dates. The historical version., Roman calendar, 365 days calendar date to Gregorian date, Hindu mean lunisolar calendar to Gregorian date, ... +14
	Date and Time Hebrew calendar, Issue number generator, Time scales, Time Span Calculator, How much time between two dates?, ... +61
	Health Daily Calorie Rate, Coronavirus disease epidemic in different countries, Body proportionality, Brunhard's formula ideal weight calculator, The number of packs steroid you need for cycle, ... +13
Professional 332
	Computers IP Address and Subnet Mask Calculator (IPv4), String to list converter, Gray code converters, Vigenère cipher, Information gain calculator, ... +60
	Engineering Relations between Mass, Length, Width, and Area Density of Fabric, Power to the People, Shipment weight, Circular Intake/Exhaust Calculator, Throat Calculators, ... +34
	Finance Discount calculator, Mortgage calculator, Effective Interest Rate Calculator, Percentage, Mortgage loan early repayment date, ... +30
	Image processing Watercolor Filter, Jpeg image meta-data, Image Flip & Rotate, Box filters for image processing, Digital images parameters comparison, ... +6
	Navigation Compass Points, Fuel consumption, International Code of Signals Encoder, Flag Semaphore Translator, Points of the compass, ... +20
	Statistics Number to Probability, Text fitness (version 2), Sсhorygin similarity coefficient for a series of samples, Double exponential smoothing, Text fitness (version 3), ... +32
	Telecommunications Morse-ify and Modify., Morse Code Converter: Translate and Decode Messages, Number of agents in a call center, PBX channel number calculation, ... +1
	Units converters Ton-kilometer. Conversion based on the cost of a kilometer, Russian Length Unit Converter, Pounds to kilograms conversion and vice versa, Pressure units converter, Expressing length through different units, ... +19
	Сryptography Count the number of separated values in the list, Calculation of volume, weight or quantity of construction bars, ODT Data Extractor, BCD to Decimal Convertor, Text file decoder, ... +85
Study 421
	Astronomy Shadow length, Dates of the beginning and end of polar night and polar day at a given latitude, Declination and maximum altitude of the Sun above the horizon on a given date,
	Chemistry pH of a solution calculator, Peptide dissolution calculator, Peptides dissolution calculator., Molarity calculator, Chemical equation balancer, ... +21
	Math Ball Volume to Radius Calculator, Find the intersection of two circles, Math equation syntax, Sphere Volume and Radius Calculator, Area of a convex quadrilateral. Example of creating a calculator., ... +310
	Physics Centripetal Force Solver, Acceleration of gravity, Velocity in Uniformly Accelerated Motion in relativistic mechanics, Kinematic Equations for Constant Acceleration Calculator, Dynamics. Acceleration of an resultant force, ... +61

1003 calculators in total.

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2026-09-25 14:59:19 Peroxide content in an aqueous solution
2026-09-25 14:47:21 Universal Time
2026-09-25 14:35:00 Extracting values from text using a regular expression
2026-06-05 11:17:50 Marks on the map
2026-04-09 18:23:01 International Code of Signals

Latest requests

2025-08-24 19:02:14 Reseach
2025-08-22 12:44:45 Monthly(and Yearly) Active Calcuator
2024-12-12 23:39:16 Soul Calendar dating calculator
2024-10-12 17:27:18 Ayanamsha
2024-10-10 19:46:38 Week number generator from any given date in the past and into the future

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2026-09-12 07:11:57 Clean & Sober Time Tracker (5)
2026-07-22 08:04:11 Date plus days (46)
2026-07-17 02:42:20 A1Z26 cipher (117)
2026-07-13 11:14:10 3d coordinate systems (1)
2026-06-12 20:28:43 How many days are there between two dates? (982)

Online calculator

A web-based tool or program accessible via internet browsers, designed to perform mathematical calculations (e.g., arithmetic, algebraic, or scientific computations). Users interact with it through a web page interface without requiring software installation.

planetcalc.com, 2008.

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PLANETCALC Online calculators

Online calculator catalog

1003 calculators in total.

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Online calculator