Math Calculators

Aspect Ratio Calculator Math This aspect ratio calculator turns dimensions in one shared unit into a width-to-height ratio and calculates matching dimensions for resizing or fitting a frame. Coefficient of Variation Calculator Math Calculate sample or population relative spread, with signed CV and absolute percentage RSD. Extended Euclidean Algorithm Calculator Math Find integer coefficients x and y that reproduce the GCD of two signed integers, with complete coefficient rows and a modular inverse when it exists. Factors Calculator Math List every positive divisor and factor pair of a nonzero integer, with signed pairs for negative inputs. Geometric Mean Calculator Math Multiplicative mean with explicit nonnegative values, relative weights and equal-period changes. Greatest Common Factor Calculator Math Find the greatest divisor shared by two or more integers and inspect the Euclidean steps. Harmonic Mean Calculator Math Positive reciprocal means with relative weights and rate interpretation. Interquartile Range Calculator Math IQR, quartiles and outlier fences with explicit classroom and interpolated definitions. Least Common Multiple Calculator Math Find the least common multiple of two or more integers, with exact pairwise calculations. Mean Absolute Deviation Calculator Math Mean absolute distances from the mean or unscaled median distances from the median. Mean Median Mode Calculator Math Summarize the center and range of a numerical dataset without dropping outliers. Percent Error Calculator Math Compare one observed measurement with an entered nonzero accepted reference and distinguish absolute percent error from signed deviation. Percentage Point Calculator Math Find a signed arithmetic rate gap in percentage points or reconstruct a missing starting or ending percentage, with relative change clearly separated. Pooled Standard Deviation Calculator Math Combine within-group sample spreads with degrees-of-freedom weights. Prime Factorization Calculator Math Decompose an integer into prime powers and repeated prime factors, with division steps and a complete divisor check. Ratio Calculator Math This ratio calculator finds missing values, reduces ratios to whole-number terms, and scales or compares the values you enter. Standard Deviation Calculator Math Find sample or population standard deviation from raw observations, exact frequencies or grouped intervals. Weighted Average Calculator Math Combine numerical values with nonnegative weights and see each normalized contribution. Z-Score Calculator Math Standardize a value, reverse a score, or calculate explicitly labeled normal-model probabilities.