Math & Numbers
Exact BigInt modular arithmetic for values up to 10¹⁸: (a ± b) mod m, (a × b) mod m, a⁻¹ mod m via extended Euclid, and aᵇ mod m via fast exponentiation.
modulo-arithmetic-converterMath & Numbers
Convert moment of force (torque) between newton-metre (N·m, SI base), dyne-centimetre (dyn·cm, CGS = 10⁻⁷ N·m), pound-foot (lbf·ft = 1.3558179483314004 N·m), and kilogram-force-metre (kgf·m = 9.80665 N·m). Each factor is the exact product of the matching force factor and length factor. Converts via N·m to the target unit and lists all four equivalents. Reference: wheel-nut tightening torque ≈ 100 N·m, passenger-car engine peak torque ≈ 250 N·m.
moment-of-force-converterMath & Numbers
Compute motor efficiency η = P_out / P_in. Supports electrical input (single-phase U·I·cosφ or three-phase √3·U·I·cosφ) or direct P_in; output power can be derived from a loss breakdown (copper+iron+rotor copper+mechanical+stray) or supplied directly.
motor-efficiency-calculatorMath & Numbers
Compute three-phase induction motor slip: synchronous speed n_s = 60·f/p and slip s = (n_s − n)/n_s. Supports slip-from-speed and speed-from-slip modes; automatically flags generator mode (s < 0).
motor-slip-calculatorMath & Numbers
Build the torque-speed curve of a three-phase induction motor using the Kloss equation T/T_max = 2/(s/s_max + s_max/s). Returns rated torque, breakdown (max) torque, starting torque, breakdown slip, and a sampled T-n curve with configurable point count.
motor-torque-speedMath & Numbers
Calculate the second moment of area (I) and section modulus (Z) for common cross-sections: solid circle, rectangle, hollow tube, and I-beam. Results in mm⁴ and cm⁴.
moment-of-inertia-calculatorFinance
Calculate your net worth from a list of assets and liabilities (Net Worth = Total Assets − Total Liabilities). Enter items one per line as 'label, amount'. Shows a per-line breakdown, a share-of-total donut chart, and a financial health rating.
net-worth-calculatorMath & Numbers
Look up the molar mass (atomic weight) of several elements at once by symbol, atomic number, or name, as a sortable comparison table.
molar-mass-lookupMath & Numbers
Compute linear momentum, mass, or velocity from the other two, with kinetic energy and km/h conversion
momentum-calculatorCalculator
Estimate how much mulch, gravel, topsoil, river rock, sand or compost a landscaping job needs. Enter the area shape (rectangle, circle, triangle or tapered bed/border), dimensions and depth, then pick a material from the built-in density table (or a custom density). The estimator returns volume (m³ / liters / yd³ / ft³), weight (kg / lb / tonnes), the count of 1 m³ or 1 yd³ bulk bags, small retail bag count, optional cost, plus depth and allowance warnings. Metric and imperial units supported.
mulch-gravel-soil-bulk-bag-estimatorMath & Numbers
Solve C1V1=C2V2 dilutions, stock-to-working recipes, and simple serial dilution plans
molarity-dilution-c1v1-calcFinance
Generate a full mortgage amortization table, compare extra-payment scenarios, and visualize total interest savings
mortgage-amortization-calculator