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Browse the tool catalog - Math, Date & Finance | Page 6

Calculators, numerics, date logic, statistics, and finance tools Page 6.

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Math & Numbers

Power Calculator

Raise a base to any real exponent, with optional scientific notation and verification details

Math & Numbers

Rounding Calculator

Round numbers to integers, decimal places, tens, or hundreds using a simple rounding mode selector

Math & Numbers

Proportion Calculator

Solve proportion equations of the form a/b = c/d and calculate the missing term

Math & Numbers

Percent Error Calculator

Calculate percent error between an experimental value and a reference value

Math & Numbers

Percentage Decrease Calculator

Calculate the percentage decrease between an original value and a new value

Math & Numbers

Percentage Increase Calculator

Calculate the percentage increase between an original value and a new value

Date & Time

ICS Calendar Recurrence Rule Expander

Expand RRULE-based VEVENT recurrence into concrete occurrences and export them as JSON or a flattened ICS calendar

Math & Numbers

Regression Calculator

Run simple linear regression on paired numeric data and inspect slope, intercept, correlation, and predictions

Math & Numbers

Z-Transform Calculator (Table Lookup)

Table lookup of the unilateral Z-transform for 11 standard pairs, with parameter substitution, region of convergence, derivation note, and optional numeric X(z₀) evaluation.

Math & Numbers

Young's Modulus Calculator

Solve Young's modulus (modulus of elasticity) in the linear-elastic region using E = σ/ε (Hooke's law). Three directions: modulus E = σ/ε, stress σ = E·ε, strain ε = σ/E. Pick the unknown, supply the other two positive values. Result in MPa with a GPa reading (e.g. steel ≈ 200 000 MPa).

Math & Numbers

Therm to KWH

Convert therms to kilowatt-hours with configurable decimal precision

Math & Numbers

Years to Days

Convert whole calendar years to exact days from a specified start year