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Elevation Comparison Tool

Compare mountain heights side-by-side with an interactive visual chart

Comparator

The Elevation Comparison Tool lets you select two or more mountains and instantly see their relative heights in an interactive visual chart. This is the quickest way to understand how mountains compare — seeing that K2 is nearly as tall as Everest, or that Mont Blanc would barely reach the halfway point of Denali.

The tool renders a responsive bar chart where each mountain is represented by a proportionally scaled bar with its summit elevation labeled. You can add up to 10 mountains simultaneously, drag to reorder them, and toggle between meters and feet. The chart includes sea level, treeline, and death zone reference lines for context.

Beyond simple height comparison, the tool shows supplementary data in a comparison table below the chart: prominence, isolation, first ascent year, difficulty grade, and country. This transforms a simple visual into a comprehensive side-by-side analysis. Users can share their comparison via a unique URL or download the chart as a PNG image.

Popular pre-built comparisons (Seven Summits, Eight-thousanders, Korean 100 Famous Mountains) are available as one-click presets, providing immediate value and SEO-rich landing pages for common search queries like "Everest vs K2 height comparison."

사용 방법

  1. Start typing a mountain name in the search field — autocomplete suggests matching peaks from the MountainFYI database
  2. Select your first mountain — it appears as a colored bar in the chart
  3. Add additional mountains (up to 10) using the "+ Add Mountain" button
  4. The chart automatically scales to fit all selected mountains with proportional heights
  5. Toggle units between meters and feet using the unit switcher
  6. Hover over any bar to see detailed elevation data, prominence, and country
  7. Click "Share" to copy a unique URL for your comparison, or "Download" for a PNG export
  8. Use preset comparisons (Seven Summits, 14 Eight-thousanders, etc.) for instant results

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How to Use

  1. 1
    Select mountains to compare

    Choose two or more mountains from the database by name or summit elevation. The tool displays SRTM-derived or surveyed elevations in both meters and feet for direct comparison.

  2. 2
    Review elevation difference metrics

    Examine the absolute elevation difference, percentage height ratio, and prominence values for each peak. Topographic prominence — the vertical distance from a summit to the highest col connecting it to a higher peak — contextualizes how independently significant each mountain is.

  3. 3
    Contextualize with physiological thresholds

    Note how each elevation relates to altitude medicine thresholds: high altitude (1,500–3,500 m), very high altitude (3,500–5,500 m), and extreme altitude (above 5,500 m) as defined by the Wilderness Medical Society 2014 consensus guidelines.

About

Elevation comparison is the foundation of mountaineering intelligence. The vertical dimension of a summit — measured from mean sea level in accordance with the International Standard Atmosphere published by ICAO — determines physiological challenge, weather exposure, and logistical complexity in ways that map area and distance alone cannot capture. The database draws on authoritative sources including national geodetic surveys, SRTM remote-sensing data, and published expedition reports to provide elevations accurate to within tens of metres for all major peaks.

Topographic prominence, a companion metric to raw elevation, quantifies how much a summit rises above the highest saddle connecting it to any higher peak. Peaks with prominence exceeding 1,500 m are classified as ultra-prominent and appear on the World Mountain List maintained by Peaklist.org; they represent genuinely independent massifs rather than sub-tops on a ridge. Comparing both elevation and prominence together gives a far richer picture of a mountain's geographic and physiological significance than elevation alone.

The Wilderness Medical Society's 2014 Practice Guidelines for Prevention and Treatment of Acute Altitude Illness divide altitude into three clinical zones: high (1,500–3,500 m), very high (3,500–5,500 m), and extreme (above 5,500 m). Understanding where compared peaks fall within these zones allows climbers to anticipate acclimatization requirements, predict the onset risk of acute mountain sickness (AMS), and design ascent itineraries that respect the 300–500 m per day net elevation gain guideline above 3,000 m recommended by wilderness medicine specialists.

FAQ

What data source provides the elevation figures shown in the comparison?
Elevations are drawn from a combination of official national geodetic surveys, SRTM (Shuttle Radar Topography Mission) 90-metre resolution data, and peer-reviewed first-ascent expedition records. For the highest peaks, the figures align with the values published by the Survey of India for the Himalaya and by national institutes such as Instituto Geográfico Nacional for Andean summits. Discrepancies between sources rarely exceed 10–20 metres for well-surveyed peaks.
What is topographic prominence, and why does it matter?
Topographic prominence measures the vertical rise from a summit to the highest saddle (key col) that connects it to any higher peak. A mountain with low prominence, such as a secondary top on a ridge, may have impressive absolute elevation but contributes little independent vertical relief. Ultra-prominent peaks — those exceeding 1,500 m of prominence — are tracked by the World Mountain List and represent genuinely distinct massifs. Prominence is therefore the preferred metric for comparing the significance of summits across different mountain ranges.
How does elevation relate to atmospheric pressure and oxygen availability?
Atmospheric pressure decreases exponentially with altitude according to the hypsometric equation derived from the International Standard Atmosphere (ISA). At 5,500 m the ambient partial pressure of oxygen (PO₂) is approximately 53% of sea-level values; at 8,000 m it falls to roughly 35%. This directly constrains arterial oxygen saturation (SpO₂) and limits aerobic performance, which is why the physiological distinction between very high and extreme altitude is clinically significant for climbers and expedition planners.
Can I compare mountains on different continents using the same elevation scale?
Yes. All elevations are expressed on the same mean-sea-level (MSL) datum, making cross-continental comparison valid. The global vertical datum used as reference is typically the EGM2008 geoid model, which underpins GPS-derived height measurements. Regional datums may differ by a few metres but these offsets are corrected in the database. This means you can directly compare, for example, Denali (6,190 m MSL) with Aconcagua (6,961 m MSL) using the same vertical reference.
What is the difference between elevation, altitude, and height in mountaineering contexts?
Elevation refers to vertical distance above mean sea level for a fixed point on the Earth's surface. Altitude is used in an aeronautical or physiological sense and typically refers to the vertical distance above a reference plane, which may be MSL or local terrain. Height usually denotes vertical distance above a specific datum such as the base of a structure or local ground level. In mountaineering, elevation and altitude are often used interchangeably to describe summit position above MSL, whereas height above base camp or a specific col is a distinct metric used in ascent planning.

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