Metric Converter

import java.util.Scanner;

public class MetricConverter {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double value = Double.parseDouble(scanner.nextLine());
        String metric1 = scanner.nextLine();
        String metric2 = scanner.nextLine();
        double m2mm = 1000;
        double m2cm = 100;
        double m2mi = 0.000621371192;
        double m2in = 39.3700787;
        double m2km = 0.001;
        double m2ft = 3.2808399;
        double m2yd = 1.0936133;
        double toMeter = 0;
        double Metric2Convert = 0;


        if ("m".equalsIgnoreCase(metric1)) {
            toMeter = value;
            } else if ("mm".equalsIgnoreCase(metric1)) {
            toMeter = value / m2mm;
        } else if ("cm".equalsIgnoreCase(metric1)) {
            toMeter = value / m2cm;
        } else if ("mi".equalsIgnoreCase(metric1)) {
            toMeter = value / m2mi;
        } else if ("in".equalsIgnoreCase(metric1)) {
            toMeter = value / m2in;
        } else if ("km".equalsIgnoreCase(metric1)) {
            toMeter = value * 1000;
        } else if ("ft".equalsIgnoreCase(metric1)) {
            toMeter = value / m2ft;
        } else if ("yd".equalsIgnoreCase(metric1)) {
            toMeter = value / m2yd;
        }

        if ("m".equalsIgnoreCase(metric2)) {
            Metric2Convert = toMeter;
        } else if ("mm".equalsIgnoreCase(metric2)) {
            Metric2Convert = toMeter * m2mm;
        } else if ("cm".equalsIgnoreCase(metric2)) {
            Metric2Convert = toMeter * m2cm;
        } else if ("mi".equalsIgnoreCase(metric2)) {
            Metric2Convert = toMeter * m2mi;
        } else if ("in".equalsIgnoreCase(metric2)) {
            Metric2Convert = toMeter * m2in;
        } else if ("km".equalsIgnoreCase(metric2)) {
            Metric2Convert = toMeter / 1000;
        } else if ("ft".equalsIgnoreCase(metric2)) {
            Metric2Convert = toMeter * m2ft;
        } else if ("yd".equalsIgnoreCase(metric2)) {
            Metric2Convert = toMeter * m2yd;
        }
        System.out.printf("%.8f", Metric2Convert);
    }
}