All Online Tools & Free Calculators

Convert proper fractions, improper fractions, and mixed numbers into exact decimal numbers and percentages.

Convert decimal numbers into exact proper fractions, improper fractions, or mixed numbers in simplest terms.

High-precision mean calculator for computing arithmetic, geometric, harmonic, and RMS averages with detailed statistical dispersion metrics.

Calculate the arithmetic mean, median, mode, geometric mean, sum, and statistical range from a set of numbers.

Calculate percentage increase, percent growth, and relative difference between two values.

Calculate traditional Vietnamese nominal age (Tuoi Mu) from birth and target years using the conventional year-based method.

Calculate exact chronological age in years, months, days, hours, and next birthday countdown.

Check auspicious and inauspicious dimensions across 52.2cm, 42.9cm, and 38.8cm traditional Luoban rulers.

Calculate the final discounted price, total savings, and post-tax total from original price and discount percentages.

Solve proportions A:B = C:D for missing variable X, simplify ratios, scale recipes, and identify aspect ratios.

Convert times between world time zones (UTC, EST, PST, GMT, JST, ICT) and plan international meetings.

Solve proportions (A/B = C/D) and find missing values with step-by-step cross-multiplication.

Free online word counter and text analytics tool with character count, reading time estimation, and keyword frequency density.

Test and debug regular expressions in real time with syntax error explanations, match highlighting, and capture group breakdowns.

Calculate square roots, cube roots, and nth roots with simplified radical form and decimal precision.

Look up Golden Path and Dark Path dates, 12 Day Officers, 28 Lunar Mansions, and lucky hours for major initiatives.

Calculate powers a^b, negative exponents, fractional roots, scientific notation, and modular exponentiation.

Calculate logarithms for any base, natural log ln(x), common log log10(x), and binary log log2(x).

Round numbers to nearest integer, decimals, or place value using Half Up, Banker's Rounding, Ceil, and Floor.

Find the Greatest Common Factor (GCF / GCD / HCF) of any set of numbers with step-by-step Euclidean algorithm divisions.

Find integer quotient, remainder, mixed fraction, and decimal value for any division a ÷ b.

Calculate absolute value |x|, 1D distance |A - B|, complex modulus |a + bi|, and solve |ax + b| = c.

Calculate single event probability, complementary events, two independent events, and odds ratios.

Calculate line slope m, inclination angle, grade percentage, and equation y = mx + b.