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.
UD5 Toolkit
Accurate solar‑based prayer times using angles & coordinates — Fajr, Dhuhr, Asr, Maghrib, Isha
Set your location and press Calculate to see prayer times.
Find the best tilt angle for solar panels based on your latitude and season (summer, winter, average). Simple trigonometric estimation. No location data sent.
Convert between Gregorian and Hijri (Islamic) dates. Approximate visual reference. Local algorithm.
Enter any two of radius, mass, speed, period, force to find the others. Physics student aid.
Enter two sides of a right triangle and get the third. Also gives area and perimeter. Simple and visual.
Convert a Gregorian calendar date to its Julian Day Number and vice versa. Used in astronomy and mainframe computing.
Calculate ideal stereo speaker placement (toe-in, distance from wall) for best soundstage. Visual diagram. For audiophiles. Local tool.
Keep score for candlepin bowling with its unique rules. No strike carries automatic strikes. For New England enthusiasts.
Calculate alcohol by volume from original and final gravity readings. Also estimate attenuation and calories.
Calculate how long it will take to pay off credit card debt with fixed monthly payments or a payoff goal. Understand interest costs fully.
Estimate the baby's due date based on last menstrual period (LMP) or conception date. Also shows current week and trimester. Educational only.
Enter a number and see its prime factors displayed as a tree. Visual math helper.
Type a chemical formula like NaHCO3 and get molar mass, element breakdown. Educational.
Calculate water volume for rectangular, bow-front, and cylindrical tanks. Also computes weight of water. Supports inches/cm. Useful for dosing treatments.
Enter cash flows and discount rate to compute Net Present Value and Internal Rate of Return. Finance 101.
Calculate corrected (adjusted) age for premature infants based on birth date and due date. Important for developmental milestone tracking. Local only.
Generate and print custom calligraphy practice sheets with adjustable x-height, slant angle, and base line. Perfect for copperplate or Spencerian.
Calculate new dimensions while preserving aspect ratio, or find the ratio from width and height. For video and images.
Enter frame and art size to get equal or weighted mat borders. See a golden ratio option for an artistic touch.
Adjust cocktail ingredient quantities based on desired total volume or number of servings. Preserve classic ratios. Perfect for home bartenders.
Design a crystal grid by placing crystals on a sacred geometry template. Add notes. Screenshot your layout. Spiritual/art.
Enter hop additions with time and alpha acid to estimate International Bitterness Units. Adjust recipe.
Plan insulin or other injection sites with a visual body map and date log. Prevent lipohypertrophy.
Enter your average last frost date and generate a planting schedule for vegetables and flowers. Know exactly when to start seeds indoors or direct sow.
Calculate the correct series resistor for an LED based on supply voltage, LED forward voltage, and desired current. Circuit diagram shown. Local only.
Animated circle guides your breathing: breathe in, hold, breathe out. Customizable ratios (e.g., 4-7-8). Soothing colors, optional bell sound. Purely local.
Enter pot volume and tea type to find the right amount of dry leaf considering expansion. Avoid overflowing.
Enter isobutane canister weight, meal count, and burn time per meal to estimate how many days your fuel will last. Plan your resupply.
Select your region and see a static calendar of common pollen seasons. Informative for allergy sufferers.
Get the perfect ratio of dish soap, water, and glycerin for giant bubbles. Adjust batch size.
Enter piece count and piece size to estimate finished dimensions. Check if it fits your table.