Percentage, age & date tools, geometry, trigonometry & calculus solvers, and formula sheets.
X% of Y, X as % of Y, % change, increase.
Area, perimeter, volume & surface-area formulas - quick shape reference.
Derivative rules and common derivatives - quick reference.
Antiderivatives and integral rules - quick reference.
Area, perimeter, volume & surface area for 11 shapes - pick a shape, enter its dimensions.
Derivative of an expression in x, with the rule used and an optional numeric value at a point.
Indefinite and definite integrals for polynomials, powers, trig, exp and log forms, with the antiderivative shown.
Ratios, standard angles, identities and triangle laws - quick reference.
sin, cos, tan values, inverse angles and right triangles - step-by-step working.
Journey time from distance and average speed - solve time, distance or speed.
Profit or loss and percentage from cost and selling price - or solve for a price.
Original price before a discount or markup, or the % change between two amounts.
Everyday add, subtract, multiply, divide and percentages. Keyboard friendly.
Exact age in years, months, days.
Days, weeks, months between two dates.