Discount a lump sum, ordinary annuity or annuity due back to today, and see the interest the discount rate is charging you.
Present value is the sum of each cash flow discounted back to today at the given rate. A rate of zero returns the sum of the flows unchanged — a useful check that the discounting is wired up correctly.
Work out percentages, ratios and the odds of something happening from a set of counts.
Multiply, invert, transpose and find eigenvalues with full double precision.
Vis-viva, escape velocity, Hohmann transfers and the gravitational constant, done properly.
Range, apex, flight time and impact angle for any launch speed and angle.
Encode text to RFC 4648 Base32 and decode it back, with padding control and a byte count.
Check any phrase as a palindrome, ignoring case, accents and punctuation, and see the first mismatch.
Pick a shape or drag the points, then copy the exact clip-path polygon CSS.
Layer up to three shadows with x, y, blur, spread, opacity and inset, then copy the CSS.
