Tips: supports m, s, kg, A, K, mol, cd and derived (N, J, W, Pa, V, C, Ohm, S, F, H, T, Hz), plus common: g, L, min, h, day, km, mi, mph, km/h, ft, in, lb, atm, bar, eV, °C, °F.
Use *, /, ^, parentheses. Example checks: J = N*m, Pa = N/m^2, V = W/A.