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Projectile Motion Calculator: Calculate Projectile Range, Height, and Flight Time

Compute range, max height, and flight time for a launched projectile

PhysicsBy Numora physics teamReviewed by Numora engineering teamUpdated 

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Assumptions
m/s
degrees
m/s²
Range (horizontal distance)
91,74

Ideal trajectory, no air drag

Launched at 30m/s at 45degrees°: range 91,74, peak 22,94, flight time 4,32.

Maximum height22,94
Time of flight4,32
Time to apex2,16
Horizontal velocity21,21
Initial vertical velocity21,21
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⚡ The answer

Projectile motion describes the path of an object launched at an angle, influenced only by gravity. Key formulas are: Range R = v₀² sin(2θ) / g, Maximum Height H = v₀² sin²(θ) / (2g), and Time of Flight T = 2v₀ sin(θ) / g. For level ground, maximum range occurs at a 45° launch angle.

Quick takeaway

This calculator determines the range, maximum height, and total flight time for any projectile launched from ground level. Enter the initial speed and launch angle. It applies classical kinematics formulas, accounting for gravitational acceleration (which can be customized for Earth, Moon, or Mars scenarios). While it simplifies by ignoring air resistance and assuming a level launch/landing, it provides robust estimates for understanding fundamental projectile motion. Ideal for students, educators, or anyone exploring basic physics principles and how initial conditions influence trajectory.

What is a projectile motion?

Unlock the physics of motion with this comprehensive projectile motion calculator. Easily compute the range, maximum height, and total time of flight for any object launched at an angle, given its initial velocity and launch angle. Our tool employs classical kinematics formulas, tracing back to Galileo's foundational work on parabolic paths. While it simplifies by ignoring air resistance and assuming a level launch/landing, it provides robust estimates for many real-world scenarios. A unique feature is the configurable gravitational acceleration, allowing you to simulate trajectories on Earth, the Moon, Mars, or even Jupiter. All results are presented in standard SI units, rounded to two decimal places, offering precise insights into how initial conditions and gravity shape a projectile's journey.

The formula

Range = v₀² sin(2θ) / g Height = v₀² sin²(θ) / (2g) Time = 2v₀ sin(θ) / g
  • v₀ — initial launch speed (m/s)
  • θ — launch angle above horizontal (radians or degrees)
  • g — gravitational acceleration (9.81 m/s² on Earth)

Source: Classical kinematics of projectile motion (Galileo, Two New Sciences, 1638).

Worked examples

1Maximum range at 45°

Inputs
v0: 30angle: 45g: 9.81
Walkthrough

v₀ = 30 m/s, θ = 45°, g = 9.81. Range = 30² × sin(90°) / 9.81 = 900 / 9.81 ≈ 91.74 m. Max height = 900 × sin²(45°) / (2 × 9.81) = 900 × 0.5 / 19.62 ≈ 22.94 m. Flight time = 2 × 30 × sin(45°) / 9.81 ≈ 4.33 s.

2Lower angle, same speed

Inputs
v0: 30angle: 30g: 9.81
Walkthrough

Same launch speed but at 30°. Range = 30² × sin(60°) / 9.81 ≈ 79.4 m — about 13% less than at 45°. Max height drops to 11.5 m (half of the 45° case) and flight time to 3.06 s. Lower trajectory, shorter time aloft.

3Lunar projectile (g = 1.62)

Inputs
v0: 30angle: 45g: 1.62
Walkthrough

Same launch on the Moon. With g = 1.62 m/s² (about 1/6 of Earth's), range scales by 9.81/1.62 ≈ 6×, giving 555 m. Max height also scales 6× to ~138 m. This is why the Apollo astronauts could throw objects long distances by Earth standards.

How to use this calculator

  1. Initial velocity — Launch speed in m/s. 30 m/s ≈ 67 mph — a hard pitched baseball is around 40 m/s.
  2. Launch angle — Angle above horizontal. 45° gives maximum range when launched and landing at the same height.
  3. Gravitational acceleration — Earth surface = 9.81 m/s². Moon = 1.62. Mars = 3.71.
  4. Read the result. Use the worked examples below to sanity-check against a known scenario.

Range at different angles (v₀ = 30 m/s, g = 9.81)

AngleRange (m)Max height (m)Flight time (s)
15°45.93.071.58
30°79.411.473.06
45°91.722.944.33
60°79.434.405.30
75°45.942.785.91

Range is symmetric around 45°; height grows monotonically with angle.

Frequently asked questions

What angle gives the maximum range?
45° produces the maximum range when launching and landing at the same elevation. The formula R = v₀² sin(2θ) / g peaks where sin(2θ) = 1, i.e. 2θ = 90° → θ = 45°. If launch and landing heights differ, the optimal angle shifts slightly below 45°.
Why don't these formulas include air resistance?
Air resistance is non-linear (proportional to v²) and produces equations that don't have closed-form solutions. The drag-free formulas are the textbook starting point and are reasonably accurate for short-range, dense projectiles. For sports analytics or ballistics, drag-modeling software extends them.
What does 'range' mean in physics?
The horizontal distance a projectile travels before returning to its launch elevation. If you launch from a 10 m cliff, 'range' typically means the distance until it hits the ground 10 m below — which requires a slightly different formula.
How does gravity affect the trajectory?
Gravity pulls the projectile downward at constant acceleration g, while horizontal velocity remains constant (no air resistance). The result is a parabolic path. Stronger gravity → smaller range, lower height, shorter flight time.
What is the time of flight?
The total time the projectile is in the air, from launch to landing at the same height. Formula: T = 2 v₀ sin(θ) / g. By symmetry, time-up equals time-down.
What's the maximum height?
The peak altitude reached. Formula: H = v₀² sin²(θ) / (2g). Reached at the moment vertical velocity is zero, halfway through flight time.
Can I use this for a baseball or soccer ball?
Approximately, yes — for short distances. For longer distances or fast pitches, air resistance reduces the actual range by 10–30%. The calculator gives an upper bound; real-world ranges fall short of the ideal formula.
What about different launch and landing heights?
The classic formulas assume same elevation. If launching from a height h above the landing point, the time of flight increases and range grows beyond R = v₀² sin(2θ) / g. The optimal angle drops below 45°. Use kinematic equations directly: y(t) = h + v₀ sin(θ) t − ½g t² = 0, solve for t.

Projectile Motion glossary

Projectile
An object given an initial velocity and then moving only under gravity (and possibly air resistance). Examples: a thrown ball, a fired bullet, a launched rocket after engine cutoff.
Range
The horizontal distance a projectile travels before returning to the launch height. Maximized at a 45° launch angle for level launch/landing.
Apex
The highest point of the trajectory. Vertical velocity is zero at the apex.
Trajectory
The curved path traced by a projectile. In ideal motion (no drag), it's a parabola.
Initial velocity
The speed and direction at the moment of launch. Decomposes into horizontal v₀ cos(θ) and vertical v₀ sin(θ) components.
Air resistance
Drag force opposing motion, proportional to velocity squared. Not modeled in these formulas — significant for fast or light projectiles.

How we built this calculator

Methodology

Projectile motion separates into two independent components: horizontal motion at constant velocity v₀ cos(θ), and vertical motion under gravity starting at v₀ sin(θ). The two motions are independent — gravity affects only the vertical component.

This calculator was written by Numora physics team and reviewed by Numora engineering team before publication. Both names link to full bios with verifiable credentials.

Formula source
Classical kinematics of projectile motion (Galileo, Two New Sciences, 1638)
Last reviewed
2026-04-29
Reviewer
Numora engineering team
Calculation runs
Client-side only
NP
WRITTEN BY
Numora physics team
NE
REVIEWED AND APPROVED BY
Numora engineering team
In this review:
  • Verified the formula matches Classical kinematics of projectile motion (Galileo, Two New Sciences, 1638) (Standard Système International (SI) units).
  • Confirmed the rounding rule applied by the engine: results to 2 decimal places.
  • Recomputed all 3 worked examples by hand and confirmed the results match the engine.
  • Confirmed all 5 cited sources resolve to current pages on the issuing institution.
  • Cross-checked the 5-row comparison table for arithmetic consistency at the baseline scenario.

Reviewed on 2026-04-29 · Next review: 2027-04-29

See editorial policy

Sources & references

Every numeric assumption traces to a primary source.

  1. OpenStax University Physics, Volume 1 — Chapter 4 Motion in Two and Three DimensionsUSA
  2. MIT OpenCourseWare 8.01 — Classical Mechanics, kinematics lecturesUSA
  3. Galileo Galilei, Two New Sciences (1638) — original treatment of projectile parabolic pathINT
  4. Halliday, Resnick & Walker, Fundamentals of Physics (10th ed.)INT
  5. NIST Reference on Constants, Units, and UncertaintyUSA
  6. Numora Editorial Policy. numora.net/editorial-policy