24-Hour Time Calculator

24-Hour Time Calculator is a fast, accurate utility for converting and calculating time in 24-hour and 12-hour formats. Instantly convert 14:35 to 2:35 PM, add or subtract hours and minutes, and find exact durations between two timestamps. Built for productivity with a clean interface and instant results. Core features: - Format conversion: two-way 24-hour and 12-hour with AM/PM toggle - Time math: add and subtract durations, sum multiple times with real-time validation - Duration calculator: compute differences between start and end times, including cross-date spans Ideal for shift workers, students, developers, and project managers planning schedules or verifying timestamps. Keywords: time calculator, 24-hour time converter, duration calculator, productivity, utilities, schedule planning.