Perform basic mathematical operations (add, subtract, multiply, divide).

Uses high-precision decimal arithmetic and rounds the result to precision decimal places (0-15). Supports two or more operands applied left to right.

Perform advanced mathematical functions (trigonometry, logarithms, etc.).

Trig functions accept unit='degrees' to convert the input; inverse trig functions return degrees when unit='degrees'. pow uses exponent. Domain rules: log/ln require positive input, sqrt non-negative, factorial a non-negative integer <= 170, exp argument <= 700.

Evaluate mathematical expressions with variable substitution.

Supports +, -, *, /, %, ^ (power), parentheses, comparison/logical operators, the constants pi/e (and PI/E), and the functions sin, cos, tan, asin, acos, atan, log (base 10), ln, sqrt, pow, abs, exp, factorial. Variable names must start with a letter and may not collide with reserved names.

Perform statistical analysis on data sets.

Standard deviation and variance use the sample estimator (n-1). The percentile operation returns the 25/50/75/90/95/99th percentiles.

Convert between different units of measurement.

Categories and units — length: mm, cm, m, km, in, ft, yd, mi, mil, μm, nm; weight: mg, g, kg, t, oz, lb, st, ton; temperature: C, F, K, R; volume: ml, cl, dl, l, kl, fl_oz, cup, pt, qt, gal, tsp, tbsp, bbl; area: mm2, cm2, m2, km2, in2, ft2, yd2, mi2, acre, ha.

Perform financial calculations (interest, loans, ROI).

Rates are percentages. compound_interest/present_value/future_value default to annual compounding (periods=1); loan_payment defaults to monthly (periods=12). roi uses principal (initial) and future_value (final).

Get comprehensive statistical summary of a dataset.

Returns count, mean, median, standard deviation, variance, range, min, max and the 25/50/75th percentiles in a single call.

Calculate a specific percentile (0-100) of a dataset.

Convert multiple values between units in a single call.

Calculate Net Present Value of a series of cash flows.

Calculate Internal Rate of Return of cash flows (Newton-Raphson).

Compare multiple loan options and identify the lowest monthly payment.

Each loan object accepts the same fields as financial_calc loan_payment (principal, rate, time, periods). Invalid loans are reported per-index rather than aborting the whole comparison.

Compare multiple investment scenarios and identify the highest return.

Each scenario defaults to compound_interest but may set operation to any supported financial operation. Invalid scenarios are reported per-index.