- Generator of combinations which satisfy a condition
For elements with weights this calculator can filter out all combinations where total weight is under the specified limit.

- Geometric progression
This calculator computes n-th term and sum of geometric progression

- GET request string parser
This parser break GET request string to the parameter-value pairs and decodes URL-encoded sequences, if needed

- Glue solution strength
This online calculator can be used to find out required amount of dry glue and water to get the needed solution strength

- Golden ratio
This calculator determines proportions according to golden ratio

- Hill cipher
This calculator uses Hill cipher to encrypt/decrypt a block of text

Calculation of hyperbolic functions

- Hip roof calculator
This calculator will help you estimate hip roof parameters, including rafters and roof area

- How many days are there between two dates?
This calculator determines number of days between two given dates

- Huffman coding
This online calculator generates Huffman encoding for given frequency of occurrence of symbols.

- Humidification loads
This online calculator answers question "how to choose" humidifier, by calculating humidification requirements given initial and target relative humidity and building parameters

- Ideal weight calculator using Paul Broca formula
Ideal weight calculator using Paul Broca formula

- Imperial to Metric and Metric to Imperial measures of length converter
- Incircle of a triangle
This online calculator determines the radius and area of the incircle of a triangle given the three sides

- Ingredients. Proportional quantities
This online calculator recalculates quantities of ingredients for given proportions if quantity of one ingredient has changed

- Integer factorization. Trial division
Integer factorization using trial division algorithm.

- Inverse Hyperbolic Functions
Calculation of inverse hyperbolic functions of given argument

- Inverse of a matrix
Calculating inverse matrices via adjugate matrix

- Inverse trigonometric functions
This calculator determines values of inverse trigonometric functions (arcsine, arccosine, arctangent, arccotangent, arcsecant, arccosecant) and outputs it with different measurement units (degrees, radians, minutes, etc)

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