UD5 Toolkit
Solar Panel Tilt Angle Calculator - Online Optimal Year-Round
Find the best tilt angle for solar panels based on your latitude and season (summer, winter, average). Simple trigonometric estimation. No location data sent.
Prayer Time Calculator – Online Solar‑Based Angles & Coordinates
Prayer Time Calculator
Accurate solar‑based prayer times using angles & coordinates — Fajr, Dhuhr, Asr, Maghrib, Isha
Location & Settings
Enter a value between -90 and 90.
Enter a value between -180 and 180.
Frequently Asked Questions
The angle (e.g. 18°) refers to how far below the horizon the sun must be for these prayers. A larger angle means an earlier Fajr and a later Isha. Different organizations adopt different angles based on their jurisprudence and geographical considerations.
Differences arise mainly from the chosen depression angle for Fajr/Isha and the Asr shadow factor. For example, MWL uses 18°/17°, ISNA uses 15°/15°, and Umm al-Qura uses 18.5° for Fajr and a fixed 90‑minute delay after Maghrib for Isha.
Click "Use My Current Location" and allow the browser to access your position. You can also use online maps or a GPS device. Enter decimal degrees (e.g. 21.42 for Mecca).
Prayer times are calculated in local clock time. The UTC offset converts the solar time (based on your longitude) into the official time of your region. It is automatically set from your device, but you can adjust it manually.
The Hanafi school uses a shadow length twice the object's length (plus the midday shadow), while the standard (Shafi, Maliki, Hanbali) uses a shadow length equal to the object's length. This makes Hanafi Asr time slightly later.
The earth’s tilt and orbit cause the sun’s position to shift slightly each day. Consequently, the times of sunrise, solar noon (Dhuhr), and the sun's depression below the horizon (Fajr/Isha) vary throughout the year.
In extreme latitudes the sun may never set or never rise. In such cases some prayers may be marked as Not observed. Islamic scholars recommend following the nearest moderate latitude or using specific ruling methods (e.g. angle‑based estimation).
No, it uses a fixed UTC offset. If your region observes DST, please adjust the timezone manually (e.g. add 1 hour) during the DST period. The tool does not perform automatic DST transitions.
The calculations use standard solar formulas accurate to within ±1–2 minutes for most latitudes, neglecting small atmospheric and topographical effects. They match the accuracy of popular Islamic apps and printed calendars.
Yes! Tahajjud is performed in the last third of the night. You can estimate the time by taking the interval between Maghrib and Fajr, dividing by 3, and subtracting that from Fajr. This tool shows Isha, which helps you plan night prayers.
Prayer Times
Set your location and press Calculate to see prayer times.
Times use the selected calculation method and angles. All times are local clock time.
Hijri to Gregorian Date Converter - Online Islamic Calendar
Convert between Gregorian and Hijri (Islamic) dates. Approximate visual reference. Local algorithm.
Circular Motion Calculator – Online Find Period, Speed, Force
Enter any two of radius, mass, speed, period, force to find the others. Physics student aid.
Solar Light Sun Exposure Plotter – Online Daily Direct Sun Check
Select your latitude and day of year to see sun path and identify spots with the most direct sunlight for solar garden lights. Simple visual tool.
Window Solar Heat Gain Calculator - Online Energy Efficiency Tool
Estimate solar heat gain through windows given SHGC and orientation. Understand cooling loads. Simple educational physics tool. Local.
Solar Noon Calculator - Online When Is Sun Highest
Enter a location and date to find the exact time of solar noon, sunrise, and sunset. Astronomy tool.