Movie end time calculator

It returns a clear 24-hour end time and indicates when the finish falls after midnight. Use it to plan transport, dinner, childcare, parking, or a second screening without doing clock arithmetic in your head. The calculation is deterministic and keeps the movie duration distinct from the optional pre-show buffer.

Enter the scheduled showtime and official runtime

Start with the time printed on the ticket or cinema listing, using a 24-hour clock such as 19:30. Then enter the official movie runtime in whole minutes. Runtime must be greater than zero because a zero-minute or negative film cannot produce a meaningful estimate. The calculator accepts common aliases in API requests, but using start_time and runtime_minutes makes an integration easiest to understand later. Treat the official runtime as the length of the feature itself. If a cinema already publishes an end time that includes its pre-show program, do not copy that combined duration into the runtime field. Keeping these values separate makes the result auditable and lets you adjust the uncertain part without changing the known film length. For example, a 142-minute movie starting at 19:30 ends at 21:52 when no buffer is included. The displayed start time is normalized to two digits, so 9:05 is returned as 09:05 while retaining exactly the same clock meaning.

Add a realistic trailer and advertising buffer

Use buffer_minutes for trailers, advertisements, cinema announcements, or any other delay you expect between the advertised showtime and the feature. The buffer defaults to zero, which is useful for festivals, private screenings, home viewing, or venues that state the feature start precisely. Commercial theaters often have a pre-show, but its length varies by chain, venue, day, and individual screening, so the calculator deliberately does not invent a universal assumption. Enter the allowance that matches the information you have. A 20-minute buffer added to a 142-minute runtime creates a total elapsed time of 162 minutes. From a 19:30 showtime, that produces a 22:12 estimated end. Buffer minutes must be zero or a positive whole number. Keeping the buffer visible in the response helps you compare scenarios: calculate once with the venue's usual allowance, then again with a cautious upper estimate if a connection or reservation matters. Remember that this is planning arithmetic, not a guarantee about when a particular projection begins.

Read midnight crossings and plan around the estimate

The result includes end_time, total_minutes, and day_offset. End time is a normalized 24-hour clock value. Day offset is zero when the movie ends on the same calendar day as the listed start, one when it finishes after the next midnight, and can be larger for unusually long test inputs. This avoids ambiguous results: an end_time of 00:25 paired with day_offset 1 clearly means 12:25 a.m. on the following day, not earlier on the starting date. The calculation adds the runtime and buffer directly to the showtime; it does not use a time zone, calendar, current time, or daylight-saving rule. That makes it stable and appropriate for local theater schedules, where all values refer to the same local clock. For practical plans, consider adding a separate personal margin after the returned end time for credits, restroom stops, collecting belongings, reaching the car, or walking to transit. The calculator estimates when the entered program finishes; it does not predict how quickly you can exit the venue.