Sunrise & Sunset Times by Location Calculate approximate sunrise and sunset times for any location and date.

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Sunrise & Sunset Calculator

Calculate approximate sunrise and sunset times for any location and date.

Enter Location

Enter latitude and longitude, or select a preset city.

Choose Date

Select the date you want to calculate for.

View Times

See sunrise, sunset, solar noon, daylight hours, and twilight times.

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What Is Sunrise & Sunset Calculator?

The Sunrise & Sunset Calculator computes approximate sunrise and sunset times for any location on Earth on any given date, using only latitude, longitude, and astronomical formulas. No external API is required. The tool also shows total daylight hours, solar noon (when the sun is at its highest point), and civil twilight times (dawn and dusk). It handles special cases like polar days (midnight sun) and polar nights (no sunrise) near the Earth's poles. Quick preset buttons let you select major cities instantly, or you can enter custom coordinates for any location. The calculations use the solar declination, equation of time, and hour angle formulas.

Why Use Sunrise & Sunset Calculator?

Works entirely offline — no API keys needed
Supports any location on Earth via latitude/longitude
8 preset cities for quick access
Shows sunrise, sunset, solar noon, and civil twilight
Handles polar day and polar night edge cases
Calculates total daylight hours

Common Use Cases

Photography

Find golden hour and blue hour times for landscape photography.

Outdoor Activities

Plan hikes, runs, or outdoor events around daylight availability.

Travel Planning

Know sunrise and sunset times at your travel destination.

Solar Energy

Estimate solar panel production hours for any location and date.

Agriculture

Plan field work and irrigation schedules around available daylight.

Technical Guide

The algorithm calculates the solar declination using the approximation δ = -23.45° × cos(360°/365 × (dayOfYear + 10)). The hour angle is derived from cos(HA) = (sin(-0.8333°) - sin(lat) × sin(δ)) / (cos(lat) × cos(δ)), where -0.8333° accounts for atmospheric refraction and the sun's apparent diameter. Solar noon is adjusted using the Equation of Time: EoT = 9.87 × sin(2B) - 7.53 × cos(B) - 1.5 × sin(B), where B = 360°/365 × (dayOfYear - 81). Sunrise = solar noon - HA/15, sunset = solar noon + HA/15. Civil twilight uses a depression angle of -6° instead of -0.8333°. When cos(HA) > 1, the location experiences polar night; when < -1, polar day.

Tips & Best Practices

1
Times are approximate — real sunrise/sunset can vary by a few minutes due to elevation and atmospheric conditions
2
Use preset cities for quick access to common locations
3
Civil twilight is when there's enough light for outdoor activities without artificial lighting
4
The shortest day is around the winter solstice; the longest around the summer solstice
5
For southern hemisphere locations, use negative latitude values

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Frequently Asked Questions

Q How accurate are the sunrise/sunset times?

The calculations are typically accurate to within 2-5 minutes. Factors like elevation, atmospheric pressure, and horizon obstructions can cause real-world variations.

Q What is civil twilight?

Civil twilight is the period when the sun is between 0° and 6° below the horizon. There is enough ambient light for most outdoor activities.

Q What is solar noon?

Solar noon is when the sun reaches its highest point in the sky and is directly south (in the Northern Hemisphere) or north (Southern Hemisphere).

Q What does "polar night" mean?

Polar night occurs at high latitudes when the sun doesn't rise above the horizon for the entire day. This happens during winter near the poles.

Q Do I need an API key?

No, all calculations are done algorithmically in your browser. No external services or API keys are required.

About This Tool

Sunrise & Sunset Calculator is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.